Error 22

Hi - having similar problems to others with connecting to the internet.

I have an HR20-100 and 3 H24s with a SWM/DECA installation.  I have one of those DECA units plugged into a port on my D-link router, but cannot get the internet to work.  I've tried the automatic configuration on my dvr as well as manual with port forwarding and neither of them work.  the multiroom dvr works, but just can't get on the internet.  Any thoughts on how to get this working would be appreciated.  Thanks!