How do I enable higher resolutions on my LG Flatron W1941S monitor (I am Running Fedora 9, KDE 4.2)?

How do I enable higher resolutions on my LG Flatron W1941S monitor (I am Running Fedora 9, KDE 4.2)?

I recently changed my monitor to LG Flatron W1941S. (When I say changed, I mean I just unplugged the older one and plugged in the new one.)