Belkin 7230 router and virtual servers

Hi !

Simply can't find anyone with a similar problem. I have a belkin
f5d7230-4 wireless router. I'm trying to get e-mule to work (and for
that matter msn messenger is misbehaving too) by setting up the virtual
servers. problem is whenever i enter the details such as ports and ip's
and hit apply changes it doesn't! next time i click on virtual servers
nothing is there. The other day i did manage to get 4 virtual servers
enabled but despite all the entreis being correct (i think) e-mule
still gives me low id's and fails the TCP/IP test. Now whenever i go
back to the page the 4 entries are there but if i try to delete them or
add more nothing happens! Latest firmware and all... Can anyone help?

Sean