Hummingbird activation and site errors

Love the new plugin but it's throwing errors on my site. Sometimes it won't activate at all and it gives me the warning that I may be on a local account. Other times it will activate and when only one of the GZIP functions will actually work. I know the problem is with my site and not with the plugin (i think) but it would be great to get some help taking a look and trying to identify the problem. I'll enable access to the site for testing.