Screen sharing only in one way

Hi, I'm doing screen sharing everyday -mostly for helping other with their macs- with no problem but with one person (an uncle of mine).
He uses a new 20" iMac (the late one), we can text chat, videoconferencing, audioconferencing and screen sharing in one way, I can let him control my mac but it's impossible to let me control his Mac.
The fourth button in ichat (where to ask for permission or give permission to screen sharing) is half enable, only one of the options is enabled to click on, the option for "ask for screen sharing" isn't. So I can give him permission to control my mac but not to control his mac.
How can this be possible? I asume screen sharing works in the same protocols in both ways, above all when we can do video and audio conferencing.
Thanks in advance for your help

Hi Ralph,
When you have ticked the screen sharing option in iChat>video>screen sharing and your buddy "high lights" (one click) your screen name the screen sharing icon will be displayed in black on his end indicating "enabled".
This way he can ask for your permission to share your screen.
When your contact has not ticked the screen sharing option the screen sharing icon in your contact list will be grey.
When your contact has ticked the screen sharing option as well the screen sharing icon in your contact list will be black as well.
Of course all other requirements for iChat screen sharing have to be met.
More important: I wish you a very happy new year!

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Hi Ralph,
When you have ticked the screen sharing option in iChat>video>screen sharing and your buddy "high lights" (one click) your screen name the screen sharing icon will be displayed in black on his end indicating "enabled".
This way he can ask for your permission to share your screen.
When your contact has not ticked the screen sharing option the screen sharing icon in your contact list will be grey.
When your contact has ticked the screen sharing option as well the screen sharing icon in your contact list will be black as well.
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More important: I wish you a very happy new year!

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I have suddenly lost the ability to hear the other person when screen sharing. I screen share my father's computer all the time to help him with general computer issues. I have never had a problem with audio. I can always hear him, and he can always hear me.
Suddenly, this is not working anymore. He can hear me but I cannot hear him. This occurred in the middle of a screen sharing session. We were talking to each other and then suddenly he could not hear me anymore.
What's more puzzling is that I connect to my brother's computer in the exact same way and I do not have a problem with him. Audio is two-way.
I checked my father's audio settings and he doesn't appear to have muted his mic or disabled audio. My audio output is fine. I can hear system sounds, iTunes music, etc…
Could he have pressed a function key or done something without knowing and disabled his mic?
Thoughts?

Hi,
Possibles (but not likely).
1) In System Preferences > Sound > Input he turned the volume down or changed the Mic selection.
2) In iChat > Preferences > Video section he changed the Mic selected.
3) In iChat Video Menu he "turned Off"/Disabled the Microphone Enabled item (He would have to be seeing his own Screen and have control of the Mouse)
4) Similar for the "Show Audio potion in the View Menu.
NONE (2, 3 and 4) of these have keystrokes set up in iChat or the System (1).
I am unaware if you leave an Audio or Video chat window open after the call was ended at the far end that the Mic Mute button still works. I could see that he may have such a window on his Desktop but don't see this as a working option.
Most Audio drop outs occur in Video chats and it is Internet Speed/bandwidth related (with a fair amount of Processor ability)
If the bandwidth is low (Lower that 256kbps and closer to 100kbps) then if the Frame rate is over 15fps then that computer may not be able to process the Audio as well as the Video pics and will drop the Audio.
Audio Only chats come in around 48-50kbps (top end dial-up) in 1-1 chats.
Screen Sharing at about the 120-150kbps mark (depending on how large the "Display is at the sending end)
This means if he dropped the Bandwidth Setting in iChat > Preferences > Video Section > Bandwidth Limit drop down the Bit rate from his end may have dropped (slowly/Buffered) to a point where Audio failed to be sent.
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For both of these last two things try iChat with the Connection Doctor (Video Menu Open. (You are likely to need to switch back and forth between your Screen and his).
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: Saved
ASA Version 8.2(5)
hostname HardmanASA
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names
interface Ethernet0/0
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interface Ethernet0/1
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interface Ethernet0/2
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interface Ethernet0/3
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interface Ethernet0/4
shutdown
interface Ethernet0/5
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interface Ethernet0/6
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interface Ethernet0/7
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interface Vlan20
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Cryptochecksum:30fadff4b400e42e73e17167828e046f
: end

Hello,
I seem to be having the same kind of issue although I cannot ping from either end.
Ive set up a l2tp/ipsec vpn which I am able to connect to and get ip from my ip pool (radius authentication is working).
I tried running:
access-list NAT_0 permit ip 192.168.1.0 255.255.255.0 192.168.2.0 255.255.255.0
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but i get an error msg saying that the syntax of the nat command is deprecated. Im running ASA version 8.4.
Ive fiddled around abit to find the correct syntax but have been unsuccessfull so far.
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Screen sharing only in one way

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