Hi,
I have a similar problem, I am trying to mount a CIFS share from my IOMega NAS. As I don't see anything in the net dir, I checked the /etc/fstab. performing mount -a gave me an error first that no username is specified, noticed that there was a space btw. username= //workroup/username, corrected this, and now I am getting permission denied. I ran cmod 777 on the dir but it didn't help.
//192.168.0.1/Movies /media/net/MoviesSTORCENTER cifs username=//workgroup/username,password=pw,rw,iocharset=utf8 0 0
any parameters I missed?