Internet Connection not being Shared...

I am setting up a Wireless home connection for an associate where I work. They have a Broadband connected to a wireless router which is hard wired to a laptop running WinXP. In another room of the house I have a wireless bridge hooked up to a destop computer running Win98. The computers are communicating and sharing files, but I can't get the Desktop to use the Broadband internet connection. I have the laptop set up to share internet connections. Also, this is a Linksys wireless hookup. Any ideas are appreciated.

Thanks,
Matt