CCS/MSP430FR2633: msp430fr2633

Part Number: MSP430FR2633

Tool/software: Code Composer Studio

if(Frame_Type == 12 && RXByteCtr == Rx_Length)
{

FRAM_write_ptr = (unsigned int *)FRAM_LOWER_UPPER_Timeout;
SYSCFG0 = FRWPPW | PFWP;
M_C_Length = Rx_Length - 16;

for (RXByteCtr = 17; RXByteCtr < Rx_Length; RXByteCtr++)
{
*FRAM_write_ptr++ = Xbee_Rx_Data[RXByteCtr];
}

SYSCFG0 = FRWPPW | PFWP | DFWP;

lower1 = Xbee_Rx_Data[17]<< 8;
lower1 = lower1 | Xbee_Rx_Data[18];

lower2 = Xbee_Rx_Data[19]<< 8;
lower2 = lower2 | Xbee_Rx_Data[20];

upper1 = Xbee_Rx_Data[21]<< 8;
upper1 = upper1 | Xbee_Rx_Data[22];

upper2 = Xbee_Rx_Data[23]<< 8;
upper2 = upper2 | Xbee_Rx_Data[24];

timeout = Xbee_Rx_Data[25]<< 8;
timeout = timeout | Xbee_Rx_Data[26];

limits_Write_Bit = 1;
limits_Type_Loop = 1;
Xbee_Frame_Prepare(3);
UCA0IE |= UCTXIE; // Enable USCI_A0 TX interrupt
__bis_SR_register(GIE); // Global Interrupt Enable
Frame_Stop = 1;
}

in above code  i got warnning for 

upper2 = upper2 | Xbee_Rx_Data[24];

timeout = Xbee_Rx_Data[25]<< 8;
timeout = timeout | Xbee_Rx_Data[26];  

this line and my code will not working properly please help me.