Creating Libraries

I've read all the posts I can find relating to writing your own libraries and adding them to a sketch. I'm using Arduino 0015. I've created the .h/.cpp files and put them in a path:
...\My Documents\Arduino\Libraries\Thermo
The files are name thermo.h and thermo.cpp
I've loaded Arduino and looked in the Sketch->Import Library and have not seen my libraries populate. What am I doing wrong?

I was having the same problem in v14 but moving to v18 it worked as expected!

Yeah, I realized after I posted the difference in versions so after upgrading the problem was resolved. Thanks!