HHTPS test through a HTTP proxy

I'm trying to monitor a HTTPS URL through a HTTP proxy with this in my bb-hosts :

http://xx.xx.xx.xx:80/https://www.host.com <http://xx.xx.xx.xx/https:/www.host.com>

I am getting error that server : Squi not implemented. Please help me how to resolve the same.

Regards,

-Arun