strncmp Issue in c18 compiler for My UART code ?

[nick703]

hello friends i have a configure UART on pic18f4431 using c18 compiler in MPlab ide.
and below is the my code

void main()
{	
	initial_all();
	initial_intrrupt();
	initial_start();
	initial_variables();

	/********************************************************************************************/	

		UART2_txArray(PowerOn,strlen(PowerOn));
	/*******************************************************************************************/
	
	while(1)
	{  	
		if (!strncmp(C,"{3QFG}",6))
		{
			PORTAbits.RA1 = 1;
			UART2_txArray(ComOn,strlen(ComOn));
			bPassword = TRUE;
		}
	}
}

now when i run this program using mplab simulator that time i am directly enter in this line if (!strncmp(C,"{3QFG}",6)) and every time i receive [3COM] . i am not sending any{3QFG} COMMAND.

and same code used in pic32 device using c32 compiler this function completely work. i don't know this type of behaviour of Strncmp function.

below is my full project file.