Unable to connect to internet via router
I am new to Linux.
I am running Mandrake 9.1
I have a dual boot system with also windows xp.
I am using an ADSL wired router to connect to the internet via a lan.
I have no problems at all connecting using windows XP but cannot get it to work using Mandrake.
According to the setup wizzard the lan and adsl are connected but when an attempt is made using web browser it says location not reachable.
I have also used a live cd version of linux (slax) and the internet connection works fine.
Why am I unable to connect using Mandrake?
Please help I have spent the last 3 days trying to work this out!