..how to stop PCA..

hello all,
I m working with AT89C51CC01.
My task is to generate PWM as required n stop when not required.
For this i had make one program in Keil uVision4. Check the code as follows.

#include <stdio.h>
#include "reg_c51.h"

void Init(void)
{
        CCON = 0x00;
        CR = 0x00;
        P1 = 0x00;
}
void Init_PWM_Open(void)
{
        CMOD = 0x02; // Setup PCA timer
        CL = 0x00;
        CH = 0x00;
        CCAPM2 = 0x42; //  PWM mode.
        CCAPM4 = 0x42; //  PWM mode.
        CR = 1; // Start PCA Timer.
}
void main()
{
        Init();
        while(1)
        {
                        if(P2_0 == 1)
                        {       Init_PWM_Open();        }
                        else
                        {       Init(); }
        }
}

what i expect from this code is::
when P2_0 is 1 then in PCA module 2 n 4 have start to generate PWM..n then when P2_0 is 0 then all pins of P1 must be 0.

But the problem is when i start to run program all Pins of P1 is 0..then when P2_0 is 1 then it generate PWM..but after that when i make P2_0 to 0 then both pins of P1 (module 2 n 4) r remains 1, while i had in Init() write P1 = 0x00 so must port P1 is 0.
I want to generate PWM n then when the state of P2_0 is changed then i want to use PCA modules as normal pins of P1.

In datasheet of AT89C51CC01 write that one can stop PCA with CR bit.
I had also stop CR in Init() CR = 0x00;..but it´s not give expected o/p.

if u have keil uvision4 s/w then check the performance of this code using simulator.

please help me for this problem or give any other idea or suggestion as early as possible.
Thanks in advance.