problem with adding new domain

I have a strange problem. Everything works fine, apache and mysql stop and restart fine.
I can login and use the EHCP admin, but some day the new operations statuses are pending. I found in ehcp.log this:
"Error Occured (source:query, caller: )err: query: select * from operations where ((status is null)or(status<>'ok'))and(try<3)and(info<>'') MySQL server has gone awaylast db error:MySQL server has gone away"

But the mysql server is working ok, and the ehcp config.php correct too.

And this morning each apachehcp conf file was empty. I copied back this from backup, but i don't know what was it.

Any idea?

Domain Count:281
Version: 0.29.09