Ignition key won't turn to Lock position

On my 1996 Escort LX, non-tilt steering column, the ignition key won't turn back far enough to LOCK position, and key remains in ignition. I can still turn it forward to engage the starter and drive, but I can only get the key to turn back to the ACC position (1). I have tried dry graphite lube, and failing that I have tried PB Blaster penetrating lube, which didn't work either. Anyone else have this issue? Is there a hidden key release button that I'm not seeing. Ignition worked fine the first 2 weeks since car purchase. Does ignition need to be replaced, and is it easily done? Can a new ignition be keyed to my current key set?
Thanks all

I'm sure you've tried this but wiggling the steering wheel back and forth can help. If you have an automatic does it need to be in PARK?

There is a cable that goes from the shifter up to the key switch. Its made so you cant turn the key to lock while driving down the road. It only lets you turn to lock if its in park. If the cable is out of adjustment, you wont be able to get the key out. Fred

I am sure it is the cable on the shifter out of adjustment or the shifter itself. Maybe try wiggling the shifter or jamming it hard into park.