omega.rmt

hi friends i have a vto2000a and an elastix sip server that install on pc system i want to unlock door with my ip phone grandstream 1610 vto 2000a voip number is:8001 ip phone voip number is :125 i can calling from vto 2000 to ip phone but i can't open door and i defind 55 code for vto 2000 a and dtmf mode on elastix is :info on both user please help me it is very important for me tanx