Compiler/MSP430G2553: compiler not allowing to enter a loop

Part Number: MSP430G2553

Tool/software: TI C/C++ Compiler

Hi,

i wrote a program that get adc avg

the adc is read by the timer and i set a flag that  alert me that data can be retrieve (f_wt_ready)

I have the follwoing code:

inline void AvgAdcOutput(float* weight, char cycles, char display)
{
	char i = cycles;
	*weight = 0;
	f_wt_ready = 0;
	for(i=cycles; i> 0; i--)
	{
		if(f_wt_ready)
		{
			*weight += (float)wt_temp;
			if(display == 1)
			{
				NumToString(wt_temp,msg);
				msg_location = 0x9A;
				f_msg = 1;
			}
			f_wt_ready = 0;
		}
		else
			i++;

	}
	*weight /= cycles;
}

before the loop i set  f_wt_ready = 0 for new data retrieval.

but the if inside the loop not being true even though the f_wt_ready equal 1

i think it could be something with the complier because when i remove f_wt_ready = 0  before the loop it working well

plus i can't enter a breakpoint inside the loop at run time only outside the loop.

thank you