Please scan back to my post and try the "net use" command from a Windows machine as typed. If it works, then WM needs to have this:

Server: MyServer (make sure it works by PING)
Remote: DATA
User: username
Password: password

Does the WM say "mounted successfully"? If not, different problem. Also, you might need for the share to have a user and pass for it to work correctly.

So:

a) make sure you can mount via NET USE from another Windows machine, WITH user/pass

b) ping from the N900, make sure you get a reply (you might need root access for ping - don't remember)

c) if all goes well, from NET USE \\PC\SHARE /user:USER pass you should have your four parameters.

Note there are no forward slashes in the PC name, and the path is not supported unless it has none in WMounter, so no DATA/Me, just DATA.

Also, there are no slashes in paths for NET USE, it takes backslashes. Forward slashes make up an UNC path, the kind Explorer takes as address. Make sure the line is correctly used from the previous post. If it doesn't work, you have a server issue. Post the error code from the Windows machine and I'll dig in.