Out Of Memory

I am having a strange problem with my program.

http://www.dewgames.com/checkmeout.zip

I have WindowsXP and it works fine on my computer.

Two people who downloaded it got out of memory errors when they went to run it. They are both running win98

Does anyone know why this would be.

(RESOLVED THANKS ANYWAY)

..it was related to Xp-win2k and servicepaks.
That was:
developing on Xp or on Win2 with later servicepak (ie: sp2), while deploying on a win2k machine with younger servicepak (ie: sp1), could result in an "out of memory" error. Solutions where: upgrade clients to sp2 or downgrade developer machine to sp1...
Not sure it may be related, but it looks like a sort of explanation...