diff -r 5bb565ccfed7 auth/cas/auth.php
--- a/auth/cas/auth.php	Fri May 14 15:46:55 2010 +0200
+++ b/auth/cas/auth.php	Fri May 14 16:46:32 2010 +0200
@@ -109,6 +109,12 @@ class auth_plugin_cas extends auth_plugi
 		  return;
 		  }
 
+     if ($this->config->multiauth) {
+          $authCAS = optional_param("authCAS");
+          if ($authCAS=="NOCAS")
+            return;
+     }
+
 // Connection to CAS server
 	 $this->connectCAS();
 
@@ -128,10 +134,6 @@ class auth_plugin_cas extends auth_plugi
 	  }		
 	 
      if ($this->config->multiauth) {
-          $authCAS = optional_param("authCAS");
-          if ($authCAS=="NOCAS")
-            return;
-
 // choice authentication form for multi-authentication
 // test pgtIou parameter for proxy mode (https connection
 // in background from CAS server to the php server)