[Asterisk-Users] Problem with meetMe

[Oleh Mukha]

I try to use meetme app

after reading manual i compile and install zaptel with ztdummy
when i make lsmod
i have
ztdummy                 2532   0  (unused)
wcusb                  20064   0  (unused)
zaptel                179168   4  [ztdummy wcusb]
usb-uhci               26348   0  [ztdummy]
usbcore                51616   0  [wcusb usb-uhci]
after it i recompile asterisk and after it i have app_meetme
in 

meetme.conf i put
; Configuration file for MeetMe simple conference rooms
; for Asterisk of course.
[rooms]
; Usage is conf => confno[,pin]
conf => 4000

in extentions.conf
[outgoing]
  exten => _4000,1,Answer
  exten => _4000,2,Wait(1)
  exten => _4000,3,MeetMe(4000,Mp)
  exten => _4000,4,Hungup

when i try call from one ATA186 (using oh323) i hear message that i am alone 
in this conference and start play music on holdOn
when i call from another ATA186 i hear in first telephone signal that somebody 
conect to conference and after it i don't hear anything

i try to change codec  G711u,G711a,G29 the situation is the same
there is the logs from console

-- Executing Answer("OH323/R14186", "") in new stack
    -- Executing Wait("OH323/R14186", "1") in new stack
    -- Executing MeetMe("OH323/R14186", "4000|Mp") in new stack
  == Parsing '/usr/local/asterisk_2/etc/asterisk/meetme.conf': Found
    -- Created MeetMe conference 1023 for conference '4000'
    -- Playing 'conf-onlyperson' (language 'en')
    -- Started music on hold, class 'default', on OH323/R14186
    -- Executing Answer("OH323/R19096", "") in new stack
    -- Executing Wait("OH323/R19096", "1") in new stack
    -- Executing MeetMe("OH323/R19096", "4000|Mp") in new stack
    -- Stopped music on hold on OH323/R14186

Can anybody help me?
thanks  a lot