Any constructions fall

Hello,guys.Need a help with my server.Sorry for my bad language,use translate.
So

1. Players appear under water or under the card. Began all of a sudden. At night everything was normal, began in the afternoon.
2. Walls, columns etc aren't put, or put
ся from time to time irrespective of situation, but can fall in a minute and again not be put. The problem is chaotic. The server reinstalled, plug-ins pumped over.

 

6000.
[DOUBLEPOST=1425758906][/DOUBLEPOST]So?Any options?
[DOUBLEPOST=1425760759][/DOUBLEPOST]Problem with size of map?