The only thing I can think of, is maybe your java needs to be updated, or you don't have it at all. Go to www.java.com and download and install java.
I had this same problem a day after the field was set. Right after the field was set, i could see the teams, then the next day, like you, the page was blank. Then the day after that it was back again, and has been since.
Anyway I hope you get it to work!