When I log in I saw text below
Akismet has detected a problem. A server or network problem is preventing Akismet from working correctly. Click here for more information about how to fix the problem.
And when I click on Click here for more information
Unable to reach any Akismet servers.
A network problem or firewall is blocking all connections from your web server to Akismet.com. Akismet cannot work correctly until this is fixed. Please contact your web host or firewall administrator and give them this information about Akismet and firewalls.
What I must do?