Message reported from file system: Read timed out

Hello all,

I've recently started a new job at Profound Logic software, and am working from home. It's going well, but I'm having a lot of problems with Rational Developer for Power Systems (RPG/Cobol).

I'm running what I believe to be the latest version: 8.5.
My PC is running Windows 7 Professional, 64-bit

The problem is if I leave RDP idle for awhile, and then come back to it, when I try to update a member, or get a member list, or anything else that requires accessing the server, I get this error from RSE:

RSEF1002: Operation failed: File system input or output error.

If I click the "details" button, it says "Message reported from file system: Read timed out".

If I disconnect from the server, then reconnect all is well again... until I leave it idle again. The amount of idleness required to trigger the problem seems to vary. Sometimes 30 minutes seems to be enough to make it go haywire, but not always. Once I left it overnight, and I didn't have a problem.

I'm running this over a VPN, but I don't think the VPN is the problem, since I can leave other connections open, such as TN5250, E-mail, and misc other things, and none of them have timeout problems over this same VPN connection. Only RSE/RDP has a problem.

Has anyone encountered this before? Are there settings I can tweak? Or, something else I can do to troubleshoot it further?

Thanks!