Hello,
I recommend you to install the Kinetis SDK 1.3.0 and try the driver examples and the demo apps for your board. The kinetis SDK is an easy and fast way to enable your board.
Once you install KSDK, please try the example in the path below:
C:\Freescale\KSDK_1.3.0\examples\frdmkl25z\demo_apps\hello_world
If you have any inconvenient please don't hesitate in contact me.
Best regards,
Earl.