[musicman691]

Could you give us any less info?
We know nothing about your system. PC or Mac? Which operating system?
By AD2 I'm assuming you mean Addictive Drums 2. Is the iLok plugged into a working USB port? If you're on a PC running Windows make sure you have all power savings measures turned off in Windows Control Panel. By default the USB ports are set to turn off after a while.

How do you know the iLok is not recognized?

Try moving AD2 into the 'unused plugins' folder with PT not running and then restart PT and see if things work right. You did authorize AD2 online right?