Lpc2000

I am using gcc and insignt and have problems using Interrupts.
I'm trying to use Timer0 to generate a Interrupt, similar to the Keil
example "blinky", but the interupt is never generatet because the cpsr
register seems to be allways switched back to 0xd0. Looks like my "msr
cpsr_c, #0x10" is ingored or overwriten.
btw... the precompiled keil example works with insight, timer is
running and genarating interrupts.

please help...