screen does not unlock

You have posted in a forum for a long-obsolete Apple productity software suite, so the is no screen lock issue with such software. Also very few people will see your question here. Please tell us what Apple product you have so we can ask the Hosts to move you to a forum where you can get help faster. Also, for future positng, please remebner these points from Apple's article, "How to write a good question:

To help other members answer your question, give as many details as you can.

• Include your product name and specs such as processor speed, memory, and storage capacity. Please do not include your Serial Number, IMEI, MEID, or other personal information.
• Provide the version numbers of your operating system and relevant applications, for example "iOS 6.0.3" or "iPhoto 9.1.2".
• Describe the problem, and include any details about what seems to cause it.
• List any troubleshooting steps you've already tried, or temporary fixes you've discovered.