|Why can't you forward port 80 and 9000?|
I've never heard of a SOHO Router yet that wouldn't.
I'd say you need to contact Linksys support and ask them why you're not able to forward those two ports.
Oh, and I'd update the firmware if there's a newer version. That's always a good idea.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.