Well, make sure that you update the game to the v1.3.2053 version, so when you start the game, the version on top of the screen has that. It should work.
The install the beta 4 from
this topic into the game folder.
If it gives any errors, post the SETUP-FOTD.DEBUG -files content to a post, the file is made during your mods install and it's in the folder you try to install it into, it's a text file, so Notepad and other such programs can open the file with ease.