conditional using php

Hi there. On my registration page, i created a custom field which is called jds_role to determine if the user signing up is a parent or student (a radio button). Now, on my page I have the following:

However, on my test signup, whether I sign up as a parent or student, it always displays, “You are a Parent!”

What am I doing wrong in the above code? Also, once I figure this part out, what i need to do is add the correct code to the following so that based on how they have signed up, it will determine the level that I will convert them once they log in. Here is the code I have now which does this but converts everyone to level 2. I want it so that if a Student registers, it converts them to Level 1 and if Parent, level 2.

ID);
$user->set_role("s2member_level2"); ?>
    

if ($my_field_data="Parent") {

You’re not comparing, you’re assigning that value to the var. You need to use two equal signs.

http://www.php.net/manual/en/language.operators.assignment.php
http://www.php.net/manual/en/language.operators.comparison.php