Can't open port in firewall

[baba]

I can't open a port in the Sharing/System Pref Pane on my G4 iBook (10.4.7). I can click on Edit... on existing ports, but am unable to create a new one. I connect wirelessly to a d-link DI-624 router. The button activates when I click on it, but nothing happens. The Intel iMac works OK. I was trying to open up 5052 for DropCopy. ARD and SpyMe stopped working, also. I have all the ports open on both machines that should be.

 

[baba]

I got ARD and Spy Me to work because their ports had a setting in the Sharing Pref pane, but I still can't create a new setting. I have done all the maintenance tasks and tried doing it with a new admin. No Luck.