Embedding asm in my C code

Hi
I am using Keil uvision4, and I NEED to have a line of assembly in my c code. So when I try doing something like:

__asm("nop");

I am getting: error: #1113: Inline assembler not permitted when generating Thumb code

So after searching a bit, I figured I have two options one is putting it in #pragma arm

#pragma arm
__asm("nop");
#pragma thumb

but now I am getting:
error: #1114-D: this feature not supported on target architecture/processor

My other option according to this forum is going to Options for Target->Target->Code Generation
and then set it to ARM mode, but under Code Generation I don't have anything that allows me choose ARM mode, I only have three options under there:
Use Cross-Module Optimization
Use MicroLIB
Use Link-Time Code Generation

Any ideas??