Aakash:
@dc42 - I don't think CKOUT is outputting anything (see attached screenshot)
I think you're right, although you'll need to use a sampling frequency much greater than 8MHz to reliably see a 8MHz signal, so check with it set to 24MHz.
If you have an Arduino, you can use it to generate a clock signal to feed to XTAL1. Don't forget to use a potential divider to drop the voltage if it is a 5V Arduino.