EK-TM4C123GXL: timer is not generating the pulses

Part Number: EK-TM4C123GXL

i want to generate clock pulses at PB5

Following code is not generating the pulses at PB5. How i can generate. 

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER1); // Enable the Timer1 peripheral
while(!SysCtlPeripheralReady(SYSCTL_PERIPH_TIMER1)) // Wait for the Timer1 module to be ready.
{ }
GPIOPinConfigure(GPIO_PB5_T1CCP1);
GPIOPinTypeTimer(GPIO_PORTB_BASE, GPIO_PIN_5);
TimerConfigure(TIMER1_BASE, (TIMER_CFG_SPLIT_PAIR | TIMER_CFG_B_PERIODIC));
TimerLoadSet(TIMER1_BASE, TIMER_B,3000);
TimerEnable(TIMER1_BASE, TIMER_B);