Stackoverflow by recursion

Possible duplicate:
Runtime exception, recursion too deep

I have a problem when developing an aC # .net program, and I simplified it to a simple problem, I need to understand why this code throws a stackoverflow exception if I call the function as follows:

CheckFunc(16000);

but it works fine if I call it that

CheckFunc(1000);

here is the function:

private void CheckFunc(Int32 i)
{
    if (i == 0)
        MessageBox.Show("good");
    else
        CheckFunc(i - 1);
}

tried to make the code as simple as possible ...

I understand that there is a stack that overflows, but which stack? How can i fix this?

Thank.