lpc2148

whats wrong in my program? it wont start the task/

program:

#include <rtl.h>
#include<LPC214X.h>

void delay(void);
__task void task1 (void);
__task void task2 (void);
OS_TID tsk1, tsk2;

__task void task1 (void) // Define the function as an RTX task
{ tsk1 =os_tsk_self(); // Read the Task-ID of the first task
tsk2=os_tsk_create(task2,0); // Create the second task and assign its priority
while(1)
{ IO0CLR=0x0000000F;
delay();
IO0SET=0x0000000F;
delay();
} }

__task void task2 (void) // Define the function as an RTX task
{

while(1)
{ IO0CLR=0x00000F00;
delay();
IO0SET=0x00000F00;
delay();
} }

void delay (void)
{ unsigned int loop;

for(loop =0;loop<1000;loop++)
{ ;
} }
int main(void)
{ PINSEL0=0x00000000;
IO0DIR=0XFFFFFFFF;
os_sys_init_prio(task1,0);
}