PHP Fatal error: Undefined class name 'jsmffrontend'

Hello @ All.

Ive got a Problem with the JSMF Bridge 2.0

I cant login with the Bridge.

If i login with the right Accounddata, it only refresh the Page and nothing happend. Huh

But when i write wrong Accoundata, it comes a Notification that my password is wrong.

I enable the Joomla Error Log and found this in Error_Log:

[22-Aug-2007 09:53:50] PHP Fatal error: Undefined class name 'jsmffrontend' in /home/server/page/modules/mod_smf_login.php on line 107
[22-Aug-2007 10:01:19] PHP Fatal error: Undefined class name 'jsmffrontend' in /home/server/page/modules/mod_smf_login.php on line 107
[22-Aug-2007 10:11:26] PHP Fatal error: Undefined class name 'jsmffrontend' in /home/server/page/modules/mod_smf_login.php on line 107
[22-Aug-2007 10:25:25] PHP Fatal error: Undefined class name 'jsmffrontend' in /home/server/page/modules/mod_smf_login.php on line 107
[22-Aug-2007 10:45:27] PHP Fatal error: Undefined class name 'jsmffrontend' in /home/server/page/modules/mod_smf_recenttopics.php on line 64
[22-Aug-2007 10:45:56] PHP Fatal error: Undefined class name 'jsmffrontend' in /home/server/page/modules/mod_smf_recenttopics.php on line 64

What can i do?

I thank you for answering and say sorry for my bad english Tongue