pylon:
The code included directly in your post is a mess and doesn't even include the library header file.The attached sketch compiles if the library is correctly included:
#include "talkie.h"instead of
#include "Talkie.h"It might be that some ancient operating systems doesn't know case-sensitivity, on those your code might compile directly.
Did you install the library? Where did you install it?
If you say "it does not speak", what hardware had you attached to your Arduino (post a wiring diagram)? What type of Arduino are you using?
I installed the library in Arduino libraries, documents on windows 7. I did this as trying to install the zip file will just give me an error. The hardware used is just a speaker since the 433mhz transmitter won't work either and I also noticed the serial monitor stops once it has to start transmitting.