I have not used my iphone in about a year and i forgot the passcode lock

try this..
Unlock Disabled iPhone/iPad/iPod without iTunes through Find My iPhone

1. Go to icloud.com/#find from another device or computer.
2. If prompted, sign in with iCloud Apple ID.
3. Click All Devices at the top browse window.
4. Select device which you want to erase.

More items...

Forgot iPhone Passcode - How to Unlock Disabled/Locked iPhone or ...

How to disable iPhone to unlock it Google Search

try this link

You can simply follow the steps below:

1. Connect iPhone to computer.
2. Select iPhone in iTunes "Devices" and click "Summary".
3. Click "Check for Update" to see whether there is a new version for iPhone software.
4. Click "Restore" and follow the instructions to complete the restore process.
5. Choose "Restore from iTunes backup" when iOS Setup Assistant asks to set up your iPhone.

Or refer to the source page: Forgot iPhone Screen Lock Passcode How to Recover Lost Data on iPhone...

To recover a locked iPhone iOS Forgotten passcode or device disabled after entering wrong passcode

iPhone must be recovered on a PC or Mac to solve this problem.

CLICK HERE

mmmm write on the youtube that problem

Forgot iPhone 4 password? take it easy, there is pro article to help you: http://www.windowspasswordsrecovery.com/iphone/forgot-iphone-passcode.html

Apple code is a very vague description.

Do you forget your Passcode lock to actually access your iPhone? If so, follow this article http://support.apple.com/kb/ht1808 to restore your iPhone, its the only way past the Passcode lock due to security reasons.

If you forgot your Apple ID Password that you use to download/purchase/update new Applications/Songs/Ringtones, then you need to go to : https://iforgot.apple.com or search "iForgot" in Google. This will reset your password through an Email or Security Question.

Bad News... you may have to Restore from iTunes. Here is some info from the users manual:
Passcode Lock By default, iPhone doesn’t require you to enter a passcode to unlock it. Set a passcode: Choose General > Passcode Lock and enter a 4-digit passcode, then enter the passcode again to verify it. iPhone then requires you to enter the passcode to unlock it or to display the passcode lock settings.
Turn passcode lock off: Choose General > Passcode Lock, enter your passcode, and tap Turn Passcode Off, then enter your passcode again. Change the passcode: Choose General > Passcode Lock, enter your passcode, and tap Change Passcode. Enter your passcode again, then enter and reenter your new passcode.
If you forget your passcode, you must restore the iPhone software. See “Updating and Restoring iPhone Software” on page 204.
Set how long before your passcode is required: Choose General > Passcode Lock and enter your passcode. Tap Require Passcode, then select how long iPhone can be idle before you need to enter a passcode to unlock it.