Corel Linux is, for one thing a little bit old, if you don't feel like
editing some text files to fix this (and it might not work anyway), I'd
suggest a newer distribution.

That said, you can probably change a Software cursor variable in your
XF86Config file. It's probably just a bug in your video card, or the
xfree driver for it. There should be a XF86Config manpage for more
information on that (man XF86Config)