[Plugin: WordPress HTTPS (SSL)] HTTPS blocked dashboard for Admin entrance

Dear friends

I have the following problem: I’ve installed this plugin and I’ve put SSL on administration page. But when now I am trying to enter admin panel I receive this message :
Unable to make a secure connection to the server. This may be a problem with the server, or it may be requiring a client authentication certificate that you don’t have.

Please help me! This is very urgent. I am new to wordpress and I am scared as hell that I won’t be able to access admin panel anymore.

Your replies will be so so appreciated!

Thank you very much

http://wordpress.org/extend/plugins/wordpress-https/