Kohana / php标题和客户端库次要版本不匹配

I have come to a very strange error, and as the title says i get:

mysql_connect(): Headers and client library minor version mismatch. Headers:50095 Library:50149

After some googling i found out that it might be caused by wrong mysql/php version, well that might be right, but the thing is i am using php framework kohana and if try to run this very simple connect code without that framework:

$sql = mysql_connect("server", "root", "passowrd") or die(mysql_error());
mysql_select_db("db", $sql);

It works just fine, so my guess is that this error is caused by php script somewhere, could it be possible? And if so, can i fix it without updating server, because it's not really possible since i'm using public rented host.

Also just in case here is the class which connects to DB: http://pastebin.com/VFtj0re6

P.S i have tried to remove all code from public function connect() function, and add my own connection code which seems to be working, but it did not help.