Server with OES2 + GW8.0.1HP1 (gwwebacass+gwdomain)

At this time whe i do:
https://gw.ami.ua/gw/webacc
ih the my browser i see error:
sec_error_expired_certificate
expired 01.05.2010 07:26

How to renew the certificate?

Please, help me.
Serg