Version of phpBB3: 3.0.3
Was this a fresh install or a(n) update/upgrade/conversion (please be specific)?
It's a fresh install with converted DB from 2.0.23.
Did you use an automated wizard provided by your host to install phpBB? No.
MODs you have installed: None - yesterday I've installed custom skin, but the problem is before that.
When the problem started: After uploading the complete DB and activating the forum - from the beginning.
Your level of expertise (be honest): Beginner.
When someone tries to post about 5 or more photos with IMG tags, uploaded at international server, the page freezes at loading for about 30 seconds and it displays the error:
I asked the hosting's support and they told me that this is caused because the forum is working with the mysql4 classes and it this should be changed to mysql5 or if I prefer mysql5_improve.General Error:
SQL ERROR [ mysql4 ]
MySQL server has gone away 
Is it possible the reason to be somewhere else? How can I change the mysql version without damaging my forum installation or database?
I'll appreciate any help and ideas. Thank you very much!