Mangoh UART communication issue

Hi
Yes i do not have problem with USB ECM. I can able to use SSH properly.
but after firing AT!MAPUART=17,2 i cant able to see any data at DB9 from my application also (don’t know why).
Whats wrong am i doing?
but in the mixed console i can able to see my app data along with linux console.

Regards
Niladri