Connecting to Checkpoint Firewall.

Hi All, We are having trouble to connect FreeRadius to Checkpoint firewall and wonder/hope somebody knows Checkpoint well enough to help out. The FreeRadius is installed on a DNZ server and connects to Checkpoint through a Router. The Free Radius gets the Authentication request and responds correctly, but at the Checkpoint it is as if there is no response from FreeRadius. It seems like it is lost at the router.... Has anybody gone through this type of configuration - I'm sure we are missing some configuration thingy. Cheers, Arnnei