Oh and if you have the new Go Daddy cPanel hosting account type (saw that you posted your Host’s name in your WP forum thread) then 99% that is what is causing this issue. I am using the Go Daddy Webclassic hosting account type and temporarily had a cPanel hosting account type for testing, but it is much more restrictive than the Webclassic hosting account type and I ran into several problems with things that I had installed so I am sticking with Webclassic for now.
I have a hunch/theory that the root issue with Go Daddy cPanel hosting is that it uses very restrictive Mod Security SecRules/SecFilters, which block a lot of things. You can try to use this code in the link below to turn off Mod Security (may or may not be allowed depending on the Server configuration) or maybe you can do that from your Host Control Panel.
http://forum.ait-pro.com/forums/topic/how-to-turn-off-mod-security-mod_security-secfilterengine-off/