|Have you tried the forward from a remote computer?|
If not, I'd give that a try. That will definitely let you know rather quickly if you've created the forward correctly. While the process is the same (ie: forward <Port #> to <IP Address of internal resource>) the interface can differ greatly from one SOHO Router to the next so your best bet is to look online for the manual and download it to your PC to ensure you're creating the forward correctly.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.