Timer Library

I tried using the Timer library from the Arduino web site, Arduino Playground - Timer Library
the examples won't compile and gives an error ' Timer ' does not name a type, I think it refers to the statement Timer t ;
looking at Timer.h and Timer.cpp it seems to be missing a constructor, can someone enlighten me on this error.

I just downloaded the library and the examples on the linked page all compiled without problems.

Is that the only error you get?

I made a mistake in unziping the file inside the library folder and Arduino can't find the Timer folder, thanks for your help