Diablo 2 Start Up Problems

I have a Mac PowerBook G4 that runs on Mac OS X 10.3.9. I bought Diablo 2 Battle Chest (do to my excitement for Diablo 3 and it installed fine without problems. When I first connected to Battle.net I downloaded a patch and was starting to create my account when I was quickly disconnected. I couldn't get to the Menu Screen after word because Diablo would crash and after I get past the Title Screen. So I restarted the Mac and it let me play single player but any attempt to get to Battle.net would crash and make me restart. Now no matter what I do I can't get past the menu screen without an it "unexpectedly quitting on me". Any suggestions?