Unsigned Long Long Overflow

This program was compiled on MS Visual C++ 08

/*Fibonacci Numbers*/

#include<stdio.h>
#include<limits.h>

void fibonacci(int n)
{
	unsigned long long  fib0 = 0;	/*First Fibonacci Number*/
	unsigned long long fib1 = 1;	/*Second Fibonacci Number*/
	unsigned long long fibn = 1;	/*Nth Fibonacci Number*/
	int count =	3;	/*Hold Count*/
	
	printf("  1 :%25llu \n  2 :%25lld \n",fib0,fib1);

	while(count <= n )
	{
		fibn = fib0 + fib1 ;
		if((fibn < 0) || (fibn > ULLONG_MAX)){
			puts("\nOverflow\n");
			break;
		}
		printf("%3d :%25llu \n",count,fibn);
		fib0 = fib1;
		fib1 = fibn;
		count++;
	}
	return ;
}


int main(void)
{
	unsigned long temp = 0;
	
	puts("Fibonacci Numbers");
	fibonacci(100);	/*Print the first 100 Fibonacci Numbers*/
	
	return 0;
}

This is a part of the output :
Fibonacci Numbers

  ...snip...

  90 :      1779979416004714189
  91 :      2880067194370816120
  92 :      4660046610375530309
  93 :      7540113804746346429
  94 :     12200160415121876738
  95 :      1293530146158671551
  96 :     13493690561280548289
  97 :     14787220707439219840
  98 :      9834167195010216513
  99 :      6174643828739884737
100 :     16008811023750101250

Why are the numbers after 95th Fibonacci numbers (including it) wrong?