Server guy told that maybe reason is long script running time. Now script max. running time is 60 seconds. They can increase time for PHP, if I pay 10 euros. Do you think does it help?
Here is some server logs:
[10-Jun-2014 10:20:51] WARNING: [pool u33230] child 11892, script /home/u33230/public_html/administrator/index.php (request: POST /administrator/index.php) execution timed out (65.016675 sec), terminating
[Tue Jun 10 10:20:51 2014] [error] [client 46.163.200.69] (32)Broken pipe: FastCGI: comm with server /var/lib/apache2/fastcgi/6a1608b9e49acb786aec13f0317ee858.fastcgi aborted: write failed, referer:
www.papinniemicamping.net/administrator/...ing&view=upgrade
[Tue Jun 10 10:21:10 2014] [error] [client 46.163.200.69] FastCGI: incomplete headers (0 bytes) received from server /var/lib/apache2/fastcgi/6a1608b9e49acb786aec13f0317ee858.fastcgi, referer:
www.papinniemicamping.net/administrator/...ing&view=upgrade