TS client not working

Hi,

Need help with this one, since im not experienced on terminal services much. Just recently came across an odd issue. We have a Windows 2003 domain with all DCS 2003, but still some existing 2000 member servers. One of these servers is an application server having terminal services installed on it. Our terminal services licensing server is one of the DCs and seems to be working fine. Since 3 days, few of the application users cannot connect to the application server getting the error that 'terminal services has ended the connection' when they use termincal services client from their windows 2000/XP workstations. The funny thing is that it works when i give them admin privileges.

Any clues? I have to add that the only major change that happened before three was that we rebuilt our Certificate Authority server. It was on one of the DCs and we uninstalled and reinstalled again there.

So where do i start? Check the application server? Check the terminal services licensing server? Check certificate authority server?

Thanks in advance for the help.
dxbitAsked:
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dxbitAuthor Commented:
I found somewhere on the internet that you have to make sure that the terminal server is defined in the active directory sites and services on your domain as well as the certificate server is defined on the application server and if not to edit the registry and put it there manually. It worked when i did these steps.
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NDSSICommented:
Have you checked that users are member of Remote Desktop Users localy on the 2000 server.

/AJ
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dxbitAuthor Commented:
Sorry for the late reply. Surprisingly for those users, its working now and just this week it stopped working for another batch of users.
Yes, those users have permissions on the terminal services security tab. The funny thing is, my username even as administrator cannot connect to those application servers from those particular user's workstations terminal services client. Terminal services client works for other servers that are installed in remote administration mode, but not for those two servers which are installed in application mode.
I did a packet capture and am attaching a snapshot of that to this post. It seems the server (192.168.128.57) is sending a RST connection to the client (10.1.203.51).
Another weird thing is that when i did a packet capture on the server and did a filter for that client IP, i did not find any packets from it or to it.
Help!!!

tserror.JPG
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