Problem with H323 call via Analog phone

I have digium Tdm400 with 1 FXO and 1 FXS. I have connected the analog phone into FXS. Now if I call an extensions there is no problem, work.
If I call analog phone from sjphone extensions the analog phone (on Zap/2) ring and works.
If I call an external number with analog phone by OOH323 not work.

the dial string in extensions.conf is


where 123456 is phone number and ip is hosted switch service.

The Dial string works with SoftPhone but not works with Analog phone.

Help me