Hi Jill,
Have you been through the fixes here?
If LW Will Not Connect
First thing I'd suggest is deleting LW's preferences folder. Next thing to try would be replacing the gnutella.net file

Otherwise, try the other fixes there & if nothing helps, please post back with all of your system details (the help thread has info about which details we need).
Your version of LW's really old, you may find some problems using that one. Do you have that Pro installer saved? If you do, try updating to the latest free LW & see whether that's any better:
Lime Wire » Download LimeWire *If you don't have your Pro 4.10.5 installer saved, updating to the latest free version will remove your Pro & you won't be able to get it back!!!*