Error: module `hello` is in file 'hello.d' which cannot be read

[Alex via Digitalmars-d-learn]

Hi

I just installed D on my windows 10 and want to try to compile a 
hello world. My source is a classical

import std.stdio;
void main() {
writeln("Hello, World!");
}

And I try to compile and get

C:\D>dmd hello.d
Error: module `hello` is in file 'hello.d' which cannot be read
import path[0] = C:\D\dmd2\windows\bin\..\..\src\phobos
import path[1] = C:\D\dmd2\windows\bin\..\..\src\druntime\import

What do I do wrong ?

D is installed at de root of C:, and the hello.d source code is 
at C:\D\dmd2\sources.

Thank you to you

Alex