iPad not showing up in find my iPhone

Hi,

I am having a problem with my new iPad. I have an iPhone and iPod which both show up as devices on find my iPhone but when I set up the iPad using the same apple account it failed to show up. I have checked that all the settings are correct. The two orriginal devices were migrated to an iCloud account when the software was updated to ios5.

This is quite anoying so if anyone has any ideas on how to fix this it would be much appriciated.

Thanks