Certification Error while selecting a material in WEB UI

Hi Gurus,

The time when I select a product in WEB UI {for ex. item 10} in sales order, I am getting "CERTIFICATE ERROR". The Error is "Content was blocked because it was not signed by a valid security certificate. ". "For more information, see "Certificate Errors" in Internet Explorer Help."

This material is configurable material.

Can anybody suggest me why we are getting this error. What is the way to correct this?

Any help appreciated

Thanks

BLR