[CentOS] [ask] iodined: open_tun: /dev/net/tun: Operation not permitted

Hi guys,
I got error when executing iodined at my vps:

$ sudo iodined -f -P test1 192.168.0.1 localhost
iodined: open_tun: /dev/net/tun: Operation not permitted: Operation
not permitted


so i check
-. iodine version:
iodine IP over DNS tunneling server
version: 0.5.1 from 2009-03-21

-. uname
2.6.32-042stab068.8 #1 SMP Fri Dec 7 17:06:14 MSK 2012 i686 i686 i386 GNU/Linux

-. ls -l /dev/net/tun

rw-rw-rw- 1 root root 10, 200 May  5 00:24 /dev/net/tun

how can i resolve this problem? thanks in advance.

regards,

marco