not able to write to LCD - C program included

Hello there I am trying to display a message on the lcd of this custom designed Microcontroller kit (www.nskelectronics.in/.../8051_project_board.pdf) using P89V51RD2N. I have tried to burn the following program but it just doesn't work.Can someone help me with this ..where am I going wrong.??....

#include <REG51.H>
char check = 0x80;
sbit EN = P3^4 ;
sbit RS = P3^5;
//sbit RW = ;        //not mentioned on the schematic

void delay();
unsigned char array[3];
sfr dat = 0x90;           //data lines are connected to LCD from port P1 - as per the circuit
void delay(void);

void cmd()
{
        RS = 0;
        //RW = 0;
        EN = 1;
        EN = 0;
        delay();
}

void write_lcd()
{
        RS = 1;
        //RW = 0;
        EN = 1;
        EN = 0;
        delay();
}

void init_lcd()
{
        dat = 0x38;
        cmd();
        dat = 0x01;
        cmd();
        dat = 0x0c;
        cmd();
        dat = 0x86;
        cmd();

        dat = 0xdf;
        write_lcd();

        dat = 0x51 ;
        write_lcd();

}

void delay()
{
        int i,j;
        for(i = 0; i< 75 ; i++)
                for(j = 0; j < 75 ; j++);
}


void main()
{
        for(;;)
        init_lcd();
}

Also I would like to know the purpose of the startup code in a Keil project...Is it obligatory to use the startup code?.

Thanks