It definitely seems like one of the server validations is failing. To determine which one add in the following code to your page. Make a new line just after line 28 and add in this:
die("the validaitons that are failing are: " . $WAFV_Errors);
This should print out a message letting you know what validations failed on the page by their numbers. Please post back with this info so we can determine what the issue is.