PWM Using PIC30F6010A

_FOSC(CSW_FSCM_OFF & XT_PLL8);
_FWDT(WDT_OFF);
_FBORPOR(PBOR_ON & MCLR_EN & PWRT_OFF);
_FGS(CODE_PROT_ON);

void Delay(unsigned int del);

int main(void)
{

Delay(50000);
Delay(50000);
Delay(50000);
Delay(50000);
Delay(50000);
TRISE=0x00;
PORTE=0x00;
PTCON=0x8004;
PTMR=100;
PTPER=199;
IPC9bits.PWMIP=1;
IFS2bits.PWMIF=0;
IEC2bits.PWMIE=1;
SEVTCMP=0x00;
PWMCON1=0xFFF;
PWMCON2=0x207;
DTCON1=0x4C4C;
DTCON2=0xFF;

FLTACON=0xFF80;
FLTBCON=0xFF80;
OVDCON=0xFF00;
PDC1=0x0A;
PDC2=6553.6;


while(1)
{
Delay(50000);
Delay(50000);
Delay(50000);
}
return (0);
}

void Delay(unsigned int del)
{
while(--del);
}


this is my code pwm pulses generated but the frequency was not changed by changing PTPER value please give me a guidelines to change frequency i am using 16Mhz for controller

Thanks in advance