Hi, I also have a liteon, and although it's been pretty good value for money so far, the drive has started to stick.

I removed the cd tray cover (shiny cover on the front of the drive tray) which required quite a bit of force. Just used a flat screw driver, a bit of courage and pried it off.

I opened the case up and removed the drive to take a look. There's a mechanism around the drive which ejects it when you use the remote, or the button on the front panel, and I think this is worn out. You can manually eject the drive by pressing this little plastic lever inwards, which is a few cm from the left on the front of the drive tray.

Anyway, I replaced the drive, and left the front cover off the tray. Now if it gets stuck, I just press eject on the remote, and use a thin stick to press the plastic lever and it opens the drive. It usually works by itself after I help it out once, so I have no idea what the problem is.