Problem with opening email app from email links

[mentallo]

Here is the problem: I have my email client (PocoMail) set as my default email client. It shows up as default client in the "Default Program section" in IE7.
When I click on a email link, whether it's in another program or on a website, my email client doesn't open the compose window with the address entered BUT IE7 starts and opens about 80 windows which need to be killed with Task Manager. By the way, this has nothing to do with PocoMail because it also happens when Thunderbird is set as default.

I am stumped. Any ideas?

Thanks,
Mentallo