LCD 16x2 + PIC 16f628a (4bit mode)

[micromacro]

Hello,

I connected everything like on shematics. I made hex file after succesfull build in mikroC and burned it on pic16f628a... but all I get is black boxes in first row of my lcd.
Can you tell me where am i going wrong. I have LCD with side connections like one in attachment..

*/
// LCD module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;
sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD module connections

// Define Messages
char text1[] = "Testing LCD";
char text2[] = "using PIC16F628A";
char text3[] = "Test successful";
char text4[] = "in 4-bit mode";

void main() {
  Lcd_Init();                        // Initialize LCD
  do {
      Lcd_Cmd(_LCD_CLEAR);          // Clear display
      Lcd_Cmd(_LCD_CURSOR_OFF);      // Cursor off
      Lcd_Out(1,3,text1);            // Write message1 in 1st row
      Lcd_Out(2,1,text2);            // Write message1 in 2nd row
      Delay_ms(3000);                // delay 3s
      Lcd_Cmd(_LCD_CLEAR);          // Clear display
      Delay_ms(1000);                // delay 1s
      Lcd_Out(1,2,text3);            // Write message3 in 1st row
      Lcd_Out(2,3,text4);
      Delay_ms(3000);                // delay 3s
      } while(1);
}

[micromacro]

ooops my mistake.. my LCD is 2x20 characters..

maybe code needs to be modified? maybe this LCD has different initialization routine than 2x16 LCD code is written for?

Thanks