Wrong result using unsigned 32 bit calculations

Hi,

I experienced a problem with uint32 calculations.

The following code calculates a wrong result. Has anyone found other problems with the unsigned long integer data type?

xdata unsigned int test1 = 66;
xdata unsigned int test2 = 1000;
xdata unsigned long int result;

int main () {

  result=(unsigned long int)test1*(unsigned long int)test2;

  // result is 464 instead of 66000
  // it seems that the compiler does the calculation
  // with 16 bit operations
}

The same code works correct when using signed long int.