I'm am new to ubuntu (windows user) and I thought I would give my laptop a new life by installing ubuntu on it. Everything seems to work great considering its about 6 or 7 years old. The problem is my network adapter. It completely screws up my system when I have it in roaming mode, but I tried manual connection and that worked perfectly. It's a Linksys WPC54G Ver.2. Here's a picture

Any ideas how to fix it?