When I set up my Linksys router. I was told to do the following.
Log in your Linksys router
Click on Advance
Click on Forwarding
Click on Port Triggering (at the bottom)
and type in the following in the ports (see image)
Then click apply and then close the window and your all ready to go!
And from that point I never had a LD again.
Zantaklawz