I think I may have had trouble (can't exactly remember, it was one of them). The one I had trouble with wouldn't take my Discover card, even though it said it would, and after I called the college, I got it to work by using a Visa.
Thank you purpleflower. I tried to submit it like 5 times and it never let me get to the webpage where I could pay. They don't work today, so I will call them tomorrow and figure out. Tomorrow is the deadline, but I can't help.