Sharepoint manage trust/add certificate

Question

Hi I try to add a certificate under "central administration>security>manage trust" but I alwas get following error.

The Root Certificate that was just selected is invalid. This may be because the selected certificate requires a password and we do not support certificates that require a password. Please select another certificate.

It is a self created certificate.

More details: http://www.thorntontechnical.com/tech/sharepoint/configuring-certificates-and-trust-in-sharepoint-2010-for-accessing-exchange-web-services

Answer 1

I figured it out: it does not work in Mozilla Firefox and Google Chrome. By using the internet-explorer (for entering the central administration and adding the certificate) everything work fine!