Problem with New Booking Engine on VS Website

I can't get the drop down menu's for 'which class' to work.
I can get one or the other to work, but as I change one, the other goes blank.
I've tried resetting my browser settings but no luck?
Any suggestions?
David
Edit to title by mod to make subject clearer.... Nick
I can get one or the other to work, but as I change one, the other goes blank.
I've tried resetting my browser settings but no luck?
Any suggestions?
David
Edit to title by mod to make subject clearer.... Nick