Please Help with Signup Plugin

Hello.
I installed the Piwik Signup Plugin
http://dev.piwik.org/trac/ticket/1148
and after registering as a new User using this Plugin i am not able to access the Dashboard.
Looks like the Plugin has outdated Automatic Login Code.

Can anybody tell me what is needed to be changed so after registering people can access the Dashboard or maybe provide a Patch ?

Thanks in advance for any help.
Gretings Sextasy.