In USER mode interrupt are not coming

Hi all,
    i am using ARM9 core and using RVDS for programming, when i run my
code in the SVC mode it works fine and all the interrupt are coming
properly(i am using UART interrupt for sending and receiving data), but
as soon as i changed my mode from SVC to USR mode init.s , my code works
but interrupt are not coming means sending and recieving fails again the
code is not hanging it is just stuck up in UART loop waiting for some
data from UART.

Can anyone pls let me the solution for this problem.


thanks
Anil