Motherfucking Code::Blocks

I've had so many fucking problems with Code::Blocks (C++ compiler) but i evntually thought i had resolved them all but the next time i tried to compile a simple program

#include <iostream>

using namespace std;

int main()
{
    cout << "Hello world!" ;
    cin.get();
}


I get this error message;

"Pratice - Release" uses an invalid compiler. Skipping...
Nothing to be done.

(Obviously my project is called 'Pratice')

I tried using different compilers like Borland C++ and Cygwin GNu etc.

Please impart your wisdom /prog/

Dev-cpp for me, rofl.