Let's set up a remote support connection so that I may try to diagnose the issue. I'll send you a private message with more details.
EDIT: I noticed in my last post that I made an error in typing out the command. I left off a "\". Please try running the command again in command prompt. This is what it should look like...
If the drive requires user authentication, you can pass in your credentials like so...
net use x: \\servername\folder /persistent:yes
net use x: \\servername\folder /username:password /persistent:yes