Hi Erhan,
When did you download version 2.3.6.7? If it was prior to July 20, then you should download it again and replace the files:
mojoPortal.Web.dll
mojoPortal.Features.UI.dll
mojoPortal.Net.dll
/ContactForm/MessageListDialog.aspx
/ClientScript/jqmojo/jquery.layout.min.js
There were a few bug fixes after the initial release and the above mentioned files were patched too fix them.
And thank you very much for the beers! Very appreciated as always.
Best,
Joe