Shadowing on Xenapp 5/Windows 2008 only works for 2-3 minutes then can't see user's desktop

I have tried to shadow from both an RDP session into a Citrix server, then right-click on a user to shadow; and I tried to log into a Citrix server and launch the shadow taskbar.  We are able to see/control what the user is doing just for a minute or two, then we only see what was last left up on the user's desktop.

Is there a rollup, permission's issue, firewall port, misconfiguration that would cause or fix such an issue?  Please advise if you have any suggestions.
Thanks!
pcmsitag1Asked:
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pcmsitag1Author Commented:
Also I tried to shadow from both an RDP session to a Xenapp server and shadow a user from the AMC as well as from a ICA session logged in as a Citrix administrator to a published desktop.  Both ways resulted in lossing viewing capabilities of the end user.  I could see their desktop still and launch application but they could not see what I was doing nor could I see what they were doing.  Weird I know.
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pcmsitag1Author Commented:
Ok after doing some research it appears that the problem is related to Windows 2008/Windows 7 RDP client and not Xenapp so much.  http://support.microsoft.com/?kbid=976110 .  The attached article discusses RDP issue with RDC versions prior to v6.0 or v6.1.  I did not apply the hotfix as noted in the article, but I did do the work around.  I also updated the RDC client to 6.0 on the Windows 2003 TS Server’s.  I typically would RDP to a Xenapp server via a Windows 2003 that was on our KVM.  So after updating the RDC client on my Windows 7 box and the (2) Windows 2003 terminal servers that I used to managed the new farm remotely the shadow issue went away.  

In addition to the shadowing issue, I recall seeing “Grid Lines” when RDP’ed into the win 2k3 TS Server's.  I read online that is a result of a MS patch and the fix was to update v5.2 RDP client to v6.0, v6.1 or v7.0 depending on your OS.  There is also a patch to update windows XP SP2 and Vista clients http://support.microsoft.com/kb/952155 .  That issue has also been resolved.

That's unfortunately that no one in the Expert Exchange forum attempted to assist with the issue but it's now resolved.
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