Issue with STM32F4 CAN Bus Clock Settings

Hi,

Following is my init code for stm32f4 CAN Bus Normal mode. I've Calculated the bus to work on bit rate of 500 kbps & 16 Tq's. If i connect two discovery boards with transceivers(TJA1050) on both sides, i can see CAN data getting transmitted & received. But, If i connect CAN Bus Analyzer to the harness i'm not seeing correct CAN Bus data traffic in my PC. I doubt my clock settings.

Kindly anyone confirm am i setting the CAN Bus bit rate of 500 kbps properly with my initialization?

System Clock source details(following values received usingfunction RCC_GetClocksFreq():

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RCC Clock Source : 0x08 (PLL used as System clock) 

SYSCLK_Frequency: 168000000 

HCLK_Frequency: 168000000 

PCLK1_Frequency: 42000000 

PCLK2_Frequency: 84000000 

Init Code:

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void can1_init()

{

can1_low_level_init();

hcan1.CAN_Prescaler = 21;

hcan1.CAN_Mode = CAN_Mode_Normal;

hcan1.CAN_SJW = CAN_SJW_1tq;

hcan1.CAN_BS1 = CAN_BS1_12tq;

hcan1.CAN_BS2 = CAN_BS2_4tq;

hcan1.CAN_ABOM = DISABLE;

hcan1.CAN_AWUM = DISABLE;

hcan1.CAN_RFLM = DISABLE;

hcan1.CAN_TTCM = DISABLE;

hcan1.CAN_TXFP = DISABLE;

hcan1.CAN_NART = DISABLE;

CAN_Init(CAN1, &hcan1);

pTxM.DLC = 8;

pTxM.ExtId = 0x0200;

pTxM.IDE = CAN_ID_EXT;

pTxM.RTR = CAN_RTR_DATA;

pTxM.Data[0] = 0x00;

}