ATMEGA16 LCD 2x8 ansteuern (4Bit-Interface)

Hey,

Ich habe ein Problem. Probiere nun schon seit 2 Tagen mein 2x8 LCD zum 
laufen zu bringen, doch kriege es nicht her. Es leuchten nur die 
schwarzen Balken in der ersten Zeile.

Datenblatt LCD:
http://docs-europe.electrocomponents.com/webdocs/0f25/0900766b80f25db8.pdf


Hier der Programmcode:
/********************************
 *   Diplom_Prototyp.c      *
                 
 *   Created: 21.12.2011    *
 *   Author: Raphael Tschernitz  *
 *******************************/

#define  F_CPU 16000000UL
#define  En PINA6;
#define  Rs PINA4;
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>

void delayms(int x)    // Spart so speicherplatz..
{
  _delay_ms(x);
}
void delayus(int y)
{
  _delay_us(y);
}

void init()
{
  DDRA=0xFF;    // DDRA als Ausgang
  DDRC=0xFF;
  PORTA=0x00;
  PORTC=0x00;
}

void send(int VeeEnRsRWData4321)
{
  PORTA=1<<En;        // Enable
  delayus(50);
  PORTA=VeeEnRsRWData4321;  // Vee En Rs RW Data4-1
  delayus(100);
  PORTA=0<<En;        // Werte übernehmen
  delayus(100);        // Bisele Warta
}

void WriteChar(int VeEnRsRWData4321)
{
  PORTA=1<<Rs;
  delayus(50);
  PORTA=1<<En;        // Enable
  delayus(50);
  PORTA=VeEnRsRWData4321;  // Vee En Rs RW Data4-1
  delayus(100);
  PORTA=0<<En;        // Werte übernehmen
  delayus(50);
  PORTA=0<<Rs;
  delayus(100);        // Bisele Warta
}

void lcd_init()
{
  /* PA0  Data1
     1      2
     2    3
     3    4
     4    RS
     5    RW
     6    En
     7    Vee
  */

  /*  Power on
    Wait > 40ms
    ((Vee En RW RS D4 D3 D2 D1))
    0    0  0  0  0  0  1  1   // Function set
    Wait > 37us
    0    0  0  0  0  0  1  0   // Function set
    0    0  0  0  N  F  X  X   // N = 0; 1-line display, F = 0; 5x8 dot 
character font (meins: 0 0 0 0 1 0 0 0)
    Wait > 37us
    0    0  0  0  0  0  1  0   // Function set again :S
    0    0  0  0  N  F  X  X   // N = 0; 1-line display, F = 0; 5x8 dot 
character font (meins: 0 0 0 0 1 0 0 0)
    Wait > 37us
    0    0  0  0  0  0  0  0   // Display on/off control
    0    0  0  0  1  D  C  B   // D = 0; Display off, C = 0; Cursor off, 
B = 0; Blinking off (meins: 0 0 0 0 1 1 0 0)
    Wait > 37us
    0    0  0  0  0  0  0  0   // Display clear
    0    0  0  0  0  0  0  1
    Wait > 1.52ms
    0    0  0  0  0  0  0  0   // Entry mode set
    0    0  0  0  0  1  ID S   // I/D = 1; Increment by 1, S = 0; No 
shift (meins: 0 0 0 0 0 1 1 0)
    Wait ??
  */

  delayms(1000);

   // Function set
   send(0b01000011);

   // Function set
   send(0b01000010);
   send(0b01001000); // 1-Line Display, 5x8 dot character font
   // Function set again :S
   send(0b01000010);
   send(0b01001100); // 2-Line Display, 5x8 dot character font

   // Display on/off control
   send(0b01000000);
   send(0b01001100); // Display on, Cursor off, Blinking off

   // Display clear
   send(0b01000000);
   send(0b01000001);
   delayms(2);

   // Entry mode set
   send(0b01000000);
   send(0b01000100); // no increment by 1, no shift
  delayms(2);
}

int main(void)
{
  init();
  lcd_init();
  int i=0;
  while(i<10)        // nur zum Anzeigen, dass While-Schleife startet
  {
    PORTC=0x0F;
    delayms(100);
    PORTC=0xF0;
    delayms(100);
    i++;
  }
  PORTC=0x00;

    while(1)
    {
    // H
    WriteChar(01011000);
    WriteChar(01011000);
    delayms(500);
    }
}

Könnt Ihr einen Fehler finden, bin echt am verzweifeln. :S