Looping Problem

Everything was going fine until yesterday, I know that I’ve done something to cause the problem but I don’t know what it was. Problem: When I go to the “Manage Themes” section and select customize it goes into a loop, meaning that it just keeps re-entering the URL and I am unable to make another selection. This is very frustrating to say the least. I’m hoping someone can help me with this problem. I even switched to another theme but it keeps doing the same thing, so I know that it’s not theme related. This problem only happens in the Manage theme section and not on the site itself.

Thanks,

Dale_A