What is the error message you receive when trying Paul's steps above?
On your computer, just go to a Run prompt (never mind the software on the CD), and type in a double backslash (\\) and the IP address of your NAS product. For example, if my TeraStation's IP address was 192.168.11.150, I would type in \\192.168.11.150 in the run prompt.
When you do this, the system should either bring up a list of the shares, or display an error message. If it's the latter, please provide the error message that you get, and this should help us determine what could be causing it.