Open TCP/UDP Ports on Airport Express for filesharing

Hi All,

i need some help with configuring my airport express to be able to use filesharing programs such as emule or edonkey. Since I have not opened any ports yet, i always get a lowID message.

In the admin utility there is no field for opening ports, only port mapping and i don't know how to configure that.

Please help and tell me in detail what i have to do in order to open the ports.

I already googled and browsed many forums, so you guy are my last resort, please help.

greets

chaasser