Problem with termsrv.exe service

I'm trying to access a customer's server remotely, and I'm unable to.  Here's what happens, I open the TS client and attempt to connect to the server.  The following error pops up: Terminal Services client disconnected - The Terminal Server has ended the connection.
I attempted to use psservice to stop and restart the service, but got the following at the command prompt after the attempt: Error opening termsrv.exe on <server>  Overlapped I/O operation is in progress.
If I view the system services via AD Users and Computers from the DC, I can see termsrv listed but I'm unable to start or stop it (both options are grayed out).  
I had my customer reboot the server yesterday, and I was able to TS in immediately after...but this error has popped up again when I tried this morning.
Any suggestions on where I can look to troubleshoot this problem?  Thanks.
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>Terminal Services client disconnected - The Terminal Server has ended the connection
this message indicates, that your 90 days grace period is over.
do you have TS installed in app mode or in admin mode?
if in appmode, the ts is missing a licence server or a licence.

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Windows 2000

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