GZip Compression is not working!

Hey guys,
first of all - you did a great Job with the Hummingbird Plugin. It really fits my needs and is highly appreciated! Great work. :wink:

I do have a problem with getting the G-Zip-Compression to work on my subsite move.susanne-gottschall.de though. I am not so much into Servers and Coding that's why I couldn't really figure out what might be interfeering, but I'd be really glad if you could take a look for me!

Support Access is granted. As this is a live site please do not make any changes without coming back at me.

Thanks a ton!