Hummingbird Plugin GZIP and Browser caching problem

Hi this plugin doesn't work on Heart Internet hosting. I get the foillowing errors. Heart has asked this question. Plus I have tried this on a clean site with no plugins.
Gzip compression is installed on all our servers by default as well as mod_deflate and mod_expires like this plugin looks like it needs so this seems to have everything that is required to run on the hosting that you have set up here.

Do you happen to know how this is checking for these values? Does this plugin utilise loopback connections at all as this is something that is blocked on our shared system and quite a few Wordpress plugins do use loopbacks.
Browser Caching is not working properly:

- Your server may not have the "expires" module enabled (mod_expires for Apache, ngx_http_headers_module for NGINX)
- Another plugin may be interfering with the configuration

If re-checking and restarting does not resolve, please check with your host or open a support ticket with us.
gzip is not working properly:

- Your server may not have the "deflate" module enabled (mod_deflate for Apache, ngx_http_gzip_module for NGINX)
- Another plugin may be interfering with the configuration