"Error: function expected before (), not module *module* of type void

[Dustin Mays]

I'm getting the following error message when trying to compile a test-app I wrote:
diceroller.d(9): Error: function expected before (), not module rollDice of type void

Here is my code:
diceroller.d:
module diceroller;

import tango.io.Stdout;
import rollDice;


void main()
{
    Stdout (rollDice(6)).newline;
}

rollDice.d:
module rollDice;
import tango.math.Random;

uint rollDice(uint sides)
{
    uint result = 0;
    Random dice_Roller;
    dice_Roller = new Random();
    result = dice_Roller.next(1, (sides + 1));
    return result;
}


When I put the rollDice function in diceroller.d, all is well, compiles fine, and works as expected. But when I try to put it in a seperate module, rollDice.d, it doesn't work anymore. Note: I'm a newbie just learning D, and I'm pretty new with programming in general, so I don't quite know what's going on. :p 

Note: I think I should explain the following bit of code real quick: result = dice_Roller.next(1, (sides + 1));. As I understand it, Random.next(uint min, uint max) returns a value x where min <= x < max. So when Random.next(1,6) is called, you'll only get values between 1-5, since x can't equal the max value. I used "result = dice_Roller.next(1, (sides + 1))" so that I could write a more natural interface, as calling rollDice(7) to simulate a six-sided die would seem awkward.

Thanks in advance for any advice. :)

Dustin Mays