Mapped networks drive in C# on Windows 7 with GetDrives does not appears

Question

I have on one side a client application (running with C# 4.0 on Windows 7 64), which needs to see which remote drives from the server side are mapped.

On the other side, a server application is running (using Windows 2008 R2) under a service account called "Mydomain\MyApplicationSRV". When I'm logged on the server side, the remote drives are mapped, and are ready. When I'm asking to the server thru my client to send me back which network drives are mapped, the server does not send back any remote drives (using the DriveInfos.GetDrives() code) but sends back the "local" drives.

I read a lot of subjects about this "issue", and try several things :

1. EnableLinkedConnections on registry : failed.

2. net use with persistent : failed

3. and a lot of discussions on stackoverflow (but most are with IIS issues, that is not my case).

Any Ideas?