in the login behavicor, it is looking for the password form element to be named "Log_In_group_2_Student_ID":
"columnValues" => explode($WA_Auth_Separator,"".((isset($_POST["Log_In_group_Last_Name"]))?$_POST["Log_In_group_Last_Name"]:"") ."".$WA_Auth_Separator."".((isset($_POST["Log_In_group_2_Student_ID"]))?$_POST["Log_In_group_2_Student_ID"]:"") .""),
but that element is named "Log_In_group_Student_ID" instead::
<input id="Log_In_group_Student_ID" name="Log_In_group_Student_ID" type="password" value="<?php echo ((isset($_GET["failedLogin"]) || isset($_GET["invalid"]))?"":((isset($_COOKIE["RememberMePWD"]))?$_COOKIE["RememberMePWD"]:"")); ?>" class="formPasswordfield_Medium" tabindex="2" onBlur="hideServerError('Log_In_group_Student_ID_ServerError');">
edit the name of the form element to Log_In_group_2_Student_ID to match what the login behavior is expecting.