I set up the lock pattern last night. I tried to use my phone this morning and it will not recognize the pattern lock that was set. Yes, it is the correct sequence. As soon as I press the first correct sequence button, I get a "sorry, try again" message. I do not get anything saying to enter my google account info as was suggested in another post. I don't know what else to try.
You should be able to do a physical hard reset of the phone. Sorry, its the only way if you can't get in with the lock pattern. That is, if its really your phone and you are not trolling to find out how to break into a stolen phone. All information will be wiped out.
Factory Data Reset: Warning, back up all your data first before doing this. This will wipe all your data and return the phone to the original factory state. This can be performed by going through the menus to reset the data (Menu -> Settings -> Privacy -> factory data reset -> Reset Phone -> Erase everything) OR by the key stroke method (for HTC Hero only): Power the device OFF. Press and hold the Home and Back Arrow buttons. While holding these buttons, press and hold the End Call button. Release End Call, Home and Back arrow buttons and press the Trackball once to execute the Hard Reset. You should see some skateboarding android robots. Follow the prompts to clear the data and reset the device. The device will reboot once the process is complete.
Check out a fun infographic that teaches you how to increase storage, enhance security, improve battery life and clean your device.