MSP432P401R: Pinout problem while trying to use Character LCD(ST7066U)

Hi,

I had a msp-exp432p4111 and trying to use an external lcd with ST7066U chip.I managed to do that and started to design a board of my own. But i used an other MCU which is msp432p401R and i failed using lcd with this MCU. I think i found the problem. Normally when i feed the lcd, a few flowing pins are high but when i connect those flowing pins to the msp-exp432p4111, pins changes according to settings of msp432p4111 . I mean lets say P4.0 is low and one of the pins of LCD is high. If i connect these, the last statement is low. But this is not happening with my new board.

int main(){
  
    P4->DIR |= BIT6;
    P4->DIR |= BIT7;
    P5->DIR |= 0xFF;
    Initial_ks0066();
    CGRAM();    
    WriteIns(0x80);
    WriteString1(8,"   Light");
    WriteIns(0xc0);
    WriteString1(8,"   House");
    __bis_SR_register(LPM3_bits + GIE);
}

void WriteIns(char instruction)
{
	 P4->OUT ^= BIT7;
	 P5->OUT = instruction;
	 P4->OUT |= BIT6;            //1us
         for(i=0;i<1000;i++);
	 P4->OUT ^= BIT6;		//1us
}
//=================================
//=================================
void WriteData(char data1)
{
	 P4->OUT |= BIT7;
	 P5->OUT = data1;
	 P4->OUT |= BIT6;
         for(i=0;i<1000;i++);
	 P4->OUT ^= BIT6;
}
void WriteString1(count,MSG)
char count;
char *MSG;
{
	char i;
	for(i = 0; i<count;i++)
	{
		WriteData(MSG[i]);
	//	delay(1);
	}
}
//=================================
//=================================
void Initial_ks0066()
{
	WriteIns(0x38);
	WriteIns(0x38);
	WriteIns(0x38);
	WriteIns(0x38);
	WriteIns(0x08);
	WriteIns(0x01);
	WriteIns(0x0c);
	WriteIns(0x06);
}