hi,
does anybody know how to prevent terminal services client from getting timed out ??
thanks

This is set on a per-user basis... So first open up the properties of the particular user. Then go over the the Sessions tab, and there you can modify the Idle session limit. You can set it to "Never" if need be.

do i apply these steps on the server or on my own computer?

This setting is defined by the server, so it needs to be set there. Unless of course the server is on a domain, and then you have to set it on the domain controller.

does this apply to administration mode too?