PHP That wont Work in IE, Help, Please. :)

I’ll start out by admitting I’m not that versed in PHP, however the functionality that I have implemented works fantastically in Firefox, but NONE of it works in IE7.

#1: Basic Echo for errors in required fields will not show in IE7.

#2: Submit and subsequent redirect will not happen in IE7.

Is this something that is common or is there a tutorial on hacking this for IE?