SSLv3 warning in Firefox

Hello,

I got a signed SSL certificate from Comodo and imported it to the router. Set it in services www-ssl but I am unable to open the router from https and the following error is shown:

Firefox cannot guarantee the safety of your data on xxxxxxx because it uses SSLv3, a broken security protocol.
Advanced info: ssl_error_no_cypher_overlap

With self signed certificate everything is ok.

Please help.