Mac OS 9.1
MRJ 2.2.4
Newest Limewire available

Limewire won't launch and gives me a Type 11 error message. Restarting the machine a few times brings it back to launching, but only until the next launch;-)
I increased memory for Limewire to 64000 and that doesn't help. Now I was womdering if I should install MRJ 2.2.5 ( I am the never touch a running system type of guy).
I searched for all MRJ components on my system drive with sherlock and when I saw the folder -MRJ Cache- , I decided it would be a good guess to trash all the cache files there first and giving it one more try.
Voila, Limewire launched without problems. I did not reboot my machine, just double clicked limewire.
Maybe this can help you, too. The MRJ Cache folder is in:
System Folder-->Preference Folder-->MRJ Cache
Select all files and drag them to the trash, then empty the trash and try launching limewire.
Hope that helps you.
Cheers
peter