My messages application on my mac is not responding

The application wont respond. even after restarting the system and force quiting the app or even letting it sit open for an hour. It just wont respond. How do i fix this.

Read this whole message before doing anything.
Back up all data.
Quit Messages if it’s running.
Step 1
Hold down the option key and select
Go ▹ Library
from the Finder menu bar. Move the following items from the Library folder to the Trash (either may not exist):
Caches/com.apple.Messages
Caches/com.apple.imfoundation.IMRemoteURLConnectionAgent
Leave the Library folder open. Log out and log back in. Try Messages again. If it works now, stop here. Close the Library folder.
Step 2
If you still have problems, quit Messages again. Go back to the Finder and move the following item from the open Library folder to the Desktop:
Messages
Note: you are not moving the Messages application. You’re moving a folder named “Messages.”
Test. If Messages now works, delete the Messages folder on the Desktop. Otherwise, quit Messages again. Put back the folder you moved, overwriting the newer one that may have been created in its place, and continue.
Step 3
In the Preferences subfolder, there may be several files having names that begin with "com.apple.iChat". Move them all to the Desktop. There may also be a file with the name "com.apple.imagent.plist". Move that to the Trash.
Also in the Preferences folder, there's a subfolder named "ByHost". Open it and do the same thing.
Log out and log back in. Test again. This time Messages should perform normally, but your settings will be lost. You may be able to put back some of the files you moved to the Desktop in this step. Relaunch and test after each one. Eventually you should find one or more that causes Messages to malfunction. Delete those files and recreate whatever settings they contained.
If the issue is still not resolved, quit Messages again and put all the items you moved to the Desktop back where they were. You don’t need to replace the items you moved to the Trash. Stop here and post again.
If you later decide that you don’t like the results of steps 2 and 3, you can undo them completely by quitting Messages and restoring the items you deleted in those steps from your backup.

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== I downloaded the new version ==
== User Agent ==
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My main message usually always says, " '[name of my computer]' did not respond.' The only differing message I've received is from my mom's laptop (a Dell Latitude D610, Intel) which says that " '[name of her computer] has declined'. I've checked out the error reports which are always labeled (error -8).
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I know that this topic has been submitted a million
times, but I need personal attention now. The topic
discussions have been really helpful except for the
fact that my ichat video STILL DOESN'T WORK. I read
and do all the sets of advice and instructions and
STILL NOTHING.
My main message usually always says, " '[name of my
computer]' did not respond.' The only differing
message I've received is from my mom's laptop (a Dell
Latitude D610, Intel) which says that " '[name of her
computer] has declined'. I've checked out the error
reports which are always labeled (error -8).
Once I was able to connect, with absolutely no hitch,
when I was sent an all out video conference chat from
a G4 Mac about 4 months ago. My ichat hasn't worked
since which is why I've been trouble shooting since
then.
Based off of the advice, I opened ports 5060, 5190,
5220, 5222, 5297, 5298, 5353, 16384-16403 on both TCP
and UPD and turned the firewalls off in one then
turned them on again.
I've read the iChat support and they all say that
they are compatible with tons of operating systems
and platforms. But, my video still doesn't work to
other computers or work in general. Please can
someone tell me how to get this to work?
Puhleeeease. I've been at it for months now....
Thanks!
I, too have had the same problem, but only recently — maybe coincident with recent updates to iChat — and I too would like to know what error -8 means.
I am running a Dual 1GHz PowerPC G4 Mac with automatically updated software, connected via ADSL at 512/128. The Internet Interface is a router/firewire/switch/modem (D-Link DSL-G604T) and I have programmed it to keep the required ports open. The audio input is from an iSight: audio out to some external speakers from line out. Programming hasn't been changed for months, and the problem has only occurred recently, so it doesn't look like a Firewall or address translation problem.
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1. I tried to initiate an audio chat with someone who has a Mac Mini PowerPC with most updates on it, and a 56K modem. I have had many audio chats over many months with this person.
Some days ago, it failed to complete a connection with the comment that my end didn't answer. I take this to mean that the final handshake message from the my end wasn't sent, since the connect window indicated the other side had responded positively.
The buddy on the other end then initiated an audio chat session to which I responded. This time, error -8 was accompanied with a message that the other side had failed to respond to the final handshake.
I presumed that it was some sort of glitch either on the network or in my computer and we finished the conversation on the phone. The system has been rebooted several times in the meantime, and the integrity of the system disk checked: that should have got rid of any local anomolous state
2. The exact same thing happened today when I attempted to communicate with a new buddy introduced through email. This new buddy has recent (but unknown to me) Mac equipment running OS X, and a broadband connection.
We were testing the connection after she had set up iChat with an AIM screen name to be ready for a Saturday sched to step her through installation of some difficult to set up software.
At that point, I realised my first failure wasn't a system glitch, and found this message board.
So, any help from anybody?
Keep in mind that this is a recently-introduced problem on a stable (other than Apple updates?) system that has been running on audio and even one-way video with 4 different buddies (three on Macs and one on Win XP with AIM) for months.
George
Dr George W Gerrity Ph: +61 2 6386 3431
GWG Associates Fax: +61 2 6386 4431
P O Box 229 Time: +10 hours (ref GMT)
Harden, NSW 2587 PGP RSA Public Key Fingerprint:
AUSTRALIA 73EF 318A DFF5 EB8A 6810 49AC 0763 AF07
PowerMac3,6 Mac OS X (10.4.8) ISight Audio and Video

Most native Mac programs not responding

Hi all. Just this morning I started up my computer, and almost none of the Mac applications run.
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first of all: WELCOME TO THE DISCUSSIONS!
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