[Debuging] No RTP Engine problem in Asterisk 1.8.2

○ Error Message : No RTP engine was found. Do you have one loaded?

hi guys,

i have a problem with 1.8 branch no matter which release of 1.8 i'm using.
i can't make any sip calls, this is the error message i get on each call:

[Jan 18 19:02:15] ERROR[1698] rtp_engine.c: No RTP engine was found. Do you have one loaded?

[Jan 18 19:02:15] ERROR[1698] chan_sip.c: Got SDP but have no RTP session allocated.

i'm sure that the rtp engine is loaded this is the messages i get when loading rtp engine:

> module load res_rtp_asterisk.so

Loaded res_rtp_asterisk.so

  == Registered RTP engine 'asterisk'

  == Parsing '/etc/asterisk/rtp.conf':   == Found

  == RTP Allocating from port range 1650 -> 4650

 Loaded res_rtp_asterisk.so => (Asterisk RTP Stack)