Macbook pro airport connection timeout...

OK, so the research I’ve done on this problem indicates that it’s pretty widespread and that there’s no general solution, so I guess I’m really just looking for some suggestions. I have a 3rd gen macbook pro with OS X 10.5. When I try to connect to my Westell versalink 327w router at home, I always get a connection timeout.

Two weird things about this problem: when I was home last winter, I had no troubles whatsoever using the same exact setup (leopard too), so this leads me to believe that it might be caused by an update. Also, everything works fine when I boot windows via boot camp. If anyone knows for a fix (even if it’s complicated), I’d really appreciate it. Thanks