Windows 7: Network drive disconnects on running .exe file

Hi,

I have a peer-to-peer network in which the "server" is a win 7 ultimate machine and the "client" is a win xp machine. I need to run a setup.exe file remotely from the xp machine by opening the file from its location in a mapped virtual drive on the Win 7 machine.

In other words, where "x:\" represents the networked win 7 drive, I would go to my computer on the xp machine, navigate to x:\install\ then double click on setup.exe. This is the procedure mandated by the program I am installing on the XP in order to be able to access the database on the win 7 machine.

Here's the strange part. I am able to open the setup.exe file, but once I do so, the status of the x:\ drive changes to "disconnected" and I get a message that I must be connected to the network in order to perform the install.

Is anyone familiar with this kind of problem? Is there some security setting on either machine that is causing this problem? How do I fix that?

I will be eternally grateful for any help on this matter. Integrating this Win 7 machine into my network has been one of my most nightmarish experiences ever.

Glen