Help!(malloc failure: Cannot allocate memory)

Hi there.
What's the problem?

Code:

malloc failure: Can not allocate memory

After doing that for about 3 minutes from a starter server.
Plus when I share my data client will immediately be dropped from client

Top :

Code:

30 processes:  1 running, 28 sleeping, 1 stopped
CPU:  2.3% user,  0.0% nice, 39.2% system,  2.3% interrupt, 56.2% idle
Mem: 635M Active, 29M Inact, 454M Wired, 2340K Cache, 511M Buf, 1838M Free
Swap: 4096M Total, 129M Used, 3967M Free, 3% Inuse
malloc failure: Cannot allocate memory
  PID USERNAME    THR PRI NICE   SIZE    RES STATE   C   TIME   WCPU COMMAND
72104 root          4  20    0  3959M   611M STOP    2   0:20 19.97% game
 1220 root         24 -52   r0   115M 13284K select  2 105:18  2.93% ts3server_freebsd_a
 1134 mysql        46  20    0   454M 25572K sbwait  0  53:18  0.00% mysqld
  948 root          1  20    0 12084K   620K select  3   2:25  0.00% syslogd
 1147 root          1  20    0 46876K   724K select  0   0:45  0.00% sshd
72040 root          4  29    0   123M  9104K uwait   3   0:16  0.00% game
72034 root          4  25    0 48272K  2528K uwait   2   0:10  0.00% game
 1152 root          1  20    0 20340K   820K select  0   0:08  0.00% sendmail
72031 root          9  24    0 81620K  4756K uwait   0   0:05  0.00% db

VPS specification :
Ram : 3gb
CPU : 3.2Ghz / core * 4
HDD : 80Gb
Network : 100mb/s
Os : FreeBSD 9.2 64 bit

game file : 2089m
server file : franzi

What is the solution for it?
It is important to thank

HELP!