Well I fixed my problem, and this is how I did it:
I tried just about everything under the sun to get this program to work again. I disabled all COM ports, I disabled all game ports, I even disconnected my USB devices with the exception of my mouse. I reinstalled DosBox multiple times and multiple versions, installed new video drivers, and downloaded the newest SDL.dll - all of that did nothing. I kept trying to think back and figure out when the program stopped working. I reffered earlier in this thread to a windows update for my Radeon 9700 Pro but I figured since I installed new catalyst drivers right from the website and it didn't work, that it had nothing to do with it.
Well I finally got desperate and said what the hell, System Restore time. So I restored my computer to exactly 1 month ago. The restore point was right before the Radeon 9700 pro windows update. After about 10 minutes of restoring I finally go to luanch Dosbox and whattya know, the bastard works. I don't know if that update was really the problem, but all sources lead me to believe it was. So thankfully I can now run my old games in peace. I hope this helps anyone who may have a problem down the road, because this took me quite a while to figure out.
And to everyone who posted in this thread, thanks for the suggestions. Although none of them helped, you tried and ultimatly it led me to use system restore since nothing worked.