Find the "Settings" app on the iPad.
Tap "WiFi" to list the available networks. Tap the little blue i next to RCAS-wireless to reveal in information screen. There may or may not be a blue check mark next to RCAS-wireless.
Tap "Forget This Network".
Now that the information has been deleted for this network tap "wifi" again to list the available networks.
Enter your credentials. Firstname.lastname and your passoword.
Make sure that there is a blue check mark next to RCAS-wireless, and that wifi is on.