Custom url monitoring

Hi there guys,

just getting started with Zenoss url monitoring.

If I choose to monitor a "normal url", it works fine.

But if I would like to monitor a "custom" url - e.g. http://crm.mydomain.com:8020, I can't get it to work.

I have set up a custom monitor template to monitor this port (8020) but it keeps on spitting out a http 400 error.

Anybody tried the same thing?

Thanks for any advice,

Chris