The adsl modem (dsl 502T) was telecom suppiled then i brought a wireless router as an add on,  now I cant forward certain ports through my computer. I currently have a dynamic i.p. adress, i want to be able to change that to static in order to forward these ports.  Whenever I try change my i.p. adress type to static my internet stops working.

This is my current connection in more detail...

ADSL CABLE>>DSL 502T MODEM>>ETHERNET CABLE FROM MODEM>>WIRELESS MODEM>>ETHERNET CABLE FROM WIRELESS ROUTER>>CPU NETWORK SLOT.

I just want to know how to configure a static i.p. and be able to forward ports without breaking that flow of connection and not sutffing up the internet.

ALL HELP WELCOME.