My program can't read :(

[wossname]

I am using this code to try to read an entire file into an array

#include <fstream> 
typedef unsigned long int ULI;
.
.
.
ULI M[numElements]; //creates an unsigned long int array, numElements is sufficient to hold the entire file

for(i=0;i<numElements;i++)
{ M[i]=0; }

//open the file
ifstream fin(filename,ios::binary);
//read it into M[]
fin.read((ULI *) &M, flen);
fin.close();

But when I tested it, by printing the contents of M[] to the screen, I just get zeroes for all elements.

What's wrong with the code? It all compiles without any errors. This is in DOS by the way, DJGPP compiler.