Have you setup DHCP Reserved IP addresses for your PC on the router?
Ensure windows is set up to Auto Obtain IP addressing.
Is the DNS IP addressing filled in under Setup/Internet/Manual?
Ensure DNS relay is ON. Turn off Advanced DNS Services.
How is the Port Forwarding and Application rules setup?
If by "DHCP Reserved IP addresses" you mean static IP address, then yes. I've already given my computer a static IP address and Auto Obtain IP addressing is set up on Windows.
I'm...not a hundred percent sure about what you're asking about (I'm not super clued up on all of this), but this is what my Setup/Internet/Manual screen looks like before Advanced DNS Services is turned off:
http://i53.tinypic.com/330r2ib.png
And after Advanced DNS Services is turned off:
http://i51.tinypic.com/2i7pdox.png
As far as the Port Forwarding is concerned:
http://i51.tinypic.com/5cc802.png
And I didn't know that I had to fill anything in the Application rules, so it's empty:
http://i54.tinypic.com/52bbrs.png