Can't chat with one buddy- NEED HELP!! PLEASE EXPLAIN ERROR 8 SIMPLY!!!

i know this has already been discussed but i am technically illiterate and dont understand any of the responses previously made about opening ports- i have no idea what that means or how to do it! i am hoping someone can help me and explain how to solve this issue in simple terms please!!!
My situation is as follows:
my boyfriend and i both just bought macbooks together, v 10.5.2 leopard. we were very excited to try ichat video together. However, we found that we are getting the same error message many people are getting- the error-8. this happens when either one of us tries to initiate the conversation. HOWEVER, when a third person initiated a video chat amongst all 3 of us, we were able to see and hear each other through this 3-person video chat. The two of us have also had no problem using skype video or audio. The internal camera and microphone both seem to be working fine as well.
We both did try to go into system preferences-security-firewall- set specific preferences for applications- and added ichat. we quit out of ichat, and logged back in but we were still unsuccessful at getting video to work.
This is the dialogue i have received on the error message and i hope it helps:
Date/Time: 2008-03-10 21:28:38.359 -0400
OS Version: 10.5.2 (Build 9C2015)
Report Version: 4
iChat Connection Log:
2008-03-10 21:28:19 -0400: AVChat started with ID 2969637957.
2008-03-10 21:28:19 -0400: 0x1853e900: State change from AVChatNoState to AVChatStateWaiting.
2008-03-10 21:28:19 -0400: katie104852: State change from AVChatNoState to AVChatStateInvited.
2008-03-10 21:28:23 -0400: 0x1853e900: State change from AVChatStateWaiting to AVChatStateConnecting.
2008-03-10 21:28:23 -0400: katie104852: State change from AVChatStateInvited to AVChatStateConnecting.
2008-03-10 21:28:33 -0400: 0x1853e900: State change from AVChatStateConnecting to AVChatStateEnded.
2008-03-10 21:28:33 -0400: 0x1853e900: Error -8 (Did not receive a response from 0x1853e900.)
2008-03-10 21:28:33 -0400: katie104852: State change from AVChatStateConnecting to AVChatStateEnded.
2008-03-10 21:28:33 -0400: katie104852: Error -8 (Did not receive a response from 0x1853e900.)
Video Conference Error Report:
Video Conference Support Report:
4.370563 @Video Conference/VCInitiateConference.m:1582 type=2 (00000000/0)
[Connection Data for call id: 1 returns 1
4.469525 @Video Conference/VCInitiateConference.m:1597 type=2 (00000000/0)
[Prepare Connection With Remote Data - remote VCConnectionData: 1, local VCConnectionData: 1
Video Conference User Report:
0.000000 @:0 type=5 (00000000/16402)
[Local SIP port]
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0x954b5000 - 0x954c5fff com.apple.speech.synthesis.framework 3.6.59 /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ SpeechSynthesis.framework/Versions/A/SpeechSynthesis
0x954c6000 - 0x954f1fff libauto.dylib /usr/lib/libauto.dylib
0x954f2000 - 0x9551afff com.apple.shortcut 1 (1.0) /System/Library/PrivateFrameworks/Shortcut.framework/Versions/A/Shortcut
0x9551b000 - 0x95522fff com.apple.CoreGraphics 1.351.21 (???) /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ CoreGraphics.framework/Versions/A/Resources/libCGATS.A.dylib
0x95523000 - 0x95542fff com.apple.ImageIO.framework 2.0.1 /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ ImageIO.framework/Versions/A/Resources/libJPEG.dylib
0x95543000 - 0x95901fff com.apple.Accelerate.vecLib 3.4.2 (vecLib 3.4.2) /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.fr amework/Versions/A/libLAPACK.dylib
0x95902000 - 0x95910fff libz.1.dylib /usr/lib/libz.1.dylib
0x95911000 - 0x9596efff libstdc++.6.dylib /usr/lib/libstdc++.6.dylib
0x95ac8000 - 0x95ae0fff com.apple.openscripting 1.2.6 (???) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/OpenScripting .framework/Versions/A/OpenScripting
0x95ae1000 - 0x95bc2fff libxml2.2.dylib /usr/lib/libxml2.2.dylib
0x95bc3000 - 0x95c3afff com.apple.CFNetwork 221.5 /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CFNetwo rk.framework/Versions/A/CFNetwork
0x95c3b000 - 0x95d20fff com.apple.CoreData 100.1 (186) /System/Library/Frameworks/CoreData.framework/Versions/A/CoreData
0x95e33000 - 0x960adfff com.apple.Foundation 6.5.4 (677.15) /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
0x960ae000 - 0x960b5fff com.apple.agl 3.0.9 (AGL-3.0.9) /System/Library/Frameworks/AGL.framework/Versions/A/AGL
0x960b6000 - 0x961fbfff com.apple.ImageIO.framework 2.0.1 /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ ImageIO.framework/Versions/A/ImageIO
0x96215000 - 0x96247fff com.apple.LDAPFramework 1.4.3 (106) /System/Library/Frameworks/LDAP.framework/Versions/A/LDAP
0x96248000 - 0x96658fff com.apple.Accelerate.vecLib 3.4.2 (vecLib 3.4.2) /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.fr amework/Versions/A/libBLAS.dylib
0x96659000 - 0x9667dfff libxslt.1.dylib /usr/lib/libxslt.1.dylib
0x9667e000 - 0x966c0fff com.apple.NavigationServices 3.5.1 (161) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/NavigationSer vices.framework/Versions/A/NavigationServices
0x966c1000 - 0x966cafff com.apple.speech.recognition.framework 3.7.24 /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SpeechRecogni tion.framework/Versions/A/SpeechRecognition
0x966cb000 - 0x966cbfff com.apple.audio.units.AudioUnit 1.5 /System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit
0x966fc000 - 0x96a92fff com.apple.QuartzCore 1.5.2 /System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore
0x96a93000 - 0x96a96fff com.apple.help 1.1 (36) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Help.framewor k/Versions/A/Help
0x96a97000 - 0x96a9cfff com.apple.DisplayServicesFW 2.0 /System/Library/PrivateFrameworks/DisplayServices.framework/Versions/A/DisplayS ervices
0x96a9d000 - 0x96aa7fff com.apple.audio.SoundManager 3.9.2 /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/CarbonSound.f ramework/Versions/A/CarbonSound
0x96aa8000 - 0x96db0fff com.apple.HIToolbox 1.5.2 (???) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.fra mework/Versions/A/HIToolbox
0x96de2000 - 0x96de4fff com.apple.securityhi 3.0 (30817) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SecurityHI.fr amework/Versions/A/SecurityHI
0x96de5000 - 0x96debfff com.apple.print.framework.Print 218.0.2 (220.1) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Print.framewo rk/Versions/A/Print
0x96ecc000 - 0x96ed3fff libgcc_s.1.dylib /usr/lib/libgcc_s.1.dylib
0x96ed4000 - 0x96ed8fff libmathCommon.A.dylib /usr/lib/system/libmathCommon.A.dylib
0x96ed9000 - 0x96f65fff com.apple.QTKit 7.4.1 (14) /System/Library/Frameworks/QTKit.framework/Versions/A/QTKit
thank you!!!!!!!!

The error you are getting is common when you have a router (wired and wireless) that doesn't work properly with iChat. The problem can be at either end or even both ends of the conversation, due to the equipment that's installed. All internet traffic travels through "ports". There are thousands of ports for specific types of data. Web pages use port 80, mail others, iChat yet others. A firewall is like a honeycomb with some of the holes punched through to let data through, and others blocked with wax. The ports are blocked to protect you from "bad guys" who are trying to get in and take over your machine for their own purposes.
Home routers come with a service called NAT firewall. It is usually turned on by default and will block all but the most common ports to the Internet (these can be disabled, but it's fairly dangerous to do so). Since the hardware router blocks the ports, it doesn't matter what you set your software firewall to accept. The incoming data doesn't get that far. Some routers will automatically open the proper ports when they are requested by a program like iChat, but many do not open them automatically and have to have the ports manually opened and forwarded to a computer.
Setting ports and port-forwarding can be a daunting task. You'll either need to find a 'techie' friend who understands how to set up your routers for special services, or get a router that is certified by Apple to work with iChat.
http://docs.info.apple.com/article.html?artnum=93333 - The list hasn't been updated since July 2007, so there are many more that will work, but no official list. Of course, Apple's own hardware is set up for their programs, but they can be a little pricey. Apple does support their products, and you can get an Employee at an Apple Store to help you set up one of their devices.
Note: All of my post assumes you have routers that are separate from your modem. If your broadband provider has sold or leased you a modem/router combo unit you will need to get more information (and possibly hardware) to proceed.

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