I’m assuming you’re connected via firewire. Is this FCP 5?
If so it sounds like you didn’t delete all your preference files. Here’s what you wantto do:
Quit FCP
go to your HD and go into Users/Name/Library/preferences
Trash “com.apple.finalcutpro.plist”
Go to Final Cut User Data in the same folder
Trash “Final Cut Pro 5 Prefs”, “Final Cut Pro Obj Cache”, “Final Cut Pro Prof Cache”
Go back into FCP
Reset your scratch disks
Empty Trash AFTER you reenter FCP not before. If you do it before it will jsut recreate the same bad pref files.