Internal Server Error with Google Page Speed

[TDT]

Hi guys. I need some help with this problem, I can't figure out what I'm doing wrong. To keep it short, I am trying to integrate Google Page Speed on a website and if I do the necessary modifications to the htaccess file I get an internal server error 500 when browsing that website. Here's the content of the htaccess file, maybe you can see something weird in there:

Thanks!

[Seahorsepip Veteran]

Isn't it required to install the PageSpeed module for Apache for this to work?
As far as I know it's not just a matter of editing the htaccess file

[TDT]

Isn't it required to install the PageSpeed module for Apache for this to work?
As far as I know it's not just a matter of editing the htaccess file

I know, the module was installed ok. I mentioned the htaccess file because I think that's why I get the internal server error. But why?