diff --git a/lib/server/auth.js b/lib/server/auth.js
index b994834b..d9132612 100644
--- a/lib/server/auth.js
+++ b/lib/server/auth.js
@@ -75,12 +75,12 @@
                 res.setEncoding('utf8');
                 res.on('data', function (chunk) { body += chunk; });
                 res.on('end', function() {
-                    pCallBack(qs.parse(body).access_token);
+                    Util.exec(pCallBack, qs.parse(body).access_token);
                 });
             });
         
         req.write(data);
         req.end();
-        req.on('error', function(e) { pCallBack(e.message); });
+        req.on('error', function(e) { Util.exec(pCallBack, e.message); });
     }
 })();