Problems with Debian x64 Server

[Element]

Hello.

I'm experiencing current problems:

* Each precompiled script returns a warning in debugstring (E.G. Maps with puma markers):

 Bad constant in precompiled chunk 

* Sometimes it outputs 'Not enough memory' warning in debug, although i have about 600mb RAM free on VPS

* Can't detect mta_mysql.so module, means scripts can't use its functions, e.g. mysql_connect(), but the module is loaded

Is there any solution for some of this bugs?

If it is relevant, the OS: Debian 6 (Also known as Squeeze) x64, KVM Virtualization, 2.4ghz CPU, 1GB of RAM (usually about 600mb free). I'm running both servers under root (I don't see anything bad in doing this). Installed packages:

 build-essential automake libtool libcurl4-openssl-dev libpcre3-dev libsqlite3-dev libreadline5-dev subversion libncurses5-dev libncursesw5-dev libsparsehash-dev libmysqlclient-dev ia32-libs lib32ncursesw5 

'top' command gives about servers (doesn't overload anything):

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND 
  
7820 root      20   0  254m 135m 4392 S  1.0 12.3  23:47.57 mta-server 
30925 root      20   0  260m 137m 4076 S  1.0 12.4 125:55.42 mta-server-vg