Sorry everyone, this must be related to
http://www.eqemulator.org/forums/showthread.php?t=31243
I tried my brother's account on both PCs that were failing with mine and it worked.
The only difference with my account is that I entered the #setlsinfo 3 times with my account (twice incorrectly) and only once with his (correctly).
So I don't know if that has anything to do with it, but it may.