Can't Access Mounted Shares

I have a Windows 7 server with 10 or so drives mounted as a folder.

c:\drives\1a
c:\drives\1b
etc.

For some reason I can't access the mounted drives.

I can access the folder "drives" with full access but none of the HDs (1a, 1b, etc.) I see them listed but that's it.

Now, this part is strange, if I add a file to a drive (using the server) I can then access that drive with full permissions from my other systems. I can even delete that file but if I do then I lose the access.

Any suggestions?

MTIA

Garrie