Password in order to activate my iPAD

A password is required to activate this divice because its owner has used Find My Iphone to link it to their Apple ID

If a second-hand iOS device has been 'Activation locked' then only the previous owner can unlock it, either by providing you with the account ID and password, or by removing it from his list of devices (as he should have done before selling it) - please see http://support.apple.com/kb/ts4515

If you are unable to contact him to do this then I'm afraid you will not be able to use the device - there is no other way of unlocking it at all. Apple cannot unlock it for you.

I have turn on my pad after three months and I found this problem. I have my Apple ID but I dont remember my password.. someone can help me to solve this?