what game version do you have?
if you haven't patched it up, then you should bring it current. there is a wrap around problem with some of the displays, which was corrected by the 3rd patch.
anyway, by not raising, do you mean no more leveling at all? or you're not getting "in window" messages anymore? or that no one is getting exp from killing monster?
the higher you get, the longer it takes to go from one level to another. for instance, a figher going from Level 27 to Level 28 requires a total of 330,000,000 points.
you may be getting them, but they aren't showing. which could be a display problem. make sure you have "in game exp increases" and "verbose" turned on, so that you see the messages after every kill to verify that you ARE getting the experience.
V***V
EDIT
PS: zzoth, we don't flame anyone here.
[ 02-13-2002: Message edited by: vesselle ]