I signed a .cab file and its still bloked by windows...

[sugar2]

Hi, we purchased a DVR (digital video recording, its called EyeMax) system and it comes with a WebServer, then it supposly we can access to the cameras views from a url.

When i launch the url of the server it says that windows has blocked that content because is untrusted, then i signed the .cab file of the web server according this procedure: http://support.microsoft.com/kb/q247257/

After windows is still blocking the concents since it is issued by root and windows cannot validate it.

How can i do? Should i pay $499 for buy a verisign sign in order to validate a .cab file of a sofware that i already purchased?

Thanks in advance