Can you supply more information about your computer? LimeWire requires ALOT of memory on a Mac. You need to set the program memory to at least 80 MB for LimeWire. It will tend to run better. It will still freeze now and then, but it'll work better. Also, you can't run Norton Anti-Virus at the same time. If you don't have much memory available, you shouldn't run any other programs at the same time, either. It's quite the memory hog...

I also found that the newest 2.5.x version doesn't work on my computer. I went back to 2.4.4

Good luck!