After updating the software from 1.8.0 to 1.8.1 I got a problem. Everything is working on my page except the page where normally my forum is. I use the iframe code to have my forum on the website (not the forum that comes with oxwall). I didn´t change anything in the iframe code but now I can´t acces the forum anymore, not even when I go directly to the URL of the forum. Both Oxwall and the forum software are on my own server. I got this error:

Sorry, this document does not exist: 404, OCS, DSQ!

Does anybody knows how to fix this, or is it possible to uninstall the update and go back to version 1.8.0?

Thanks in advance.