New Member, 6th Gen Chain Won't Adjust

I recently bought an '04 w/16k miles. I love it!

I attempted to adjust/tighten the chain.
I loosened the pinch bolt, used the cresent/half moon wrench on the appropriate teeth/grooved area. I initially went the wrong way and ended up moving the unit to the left (on the chain side of the bike), which severely loosened the chain. When I attempted to go in the opposite direction, the unit would not budge (to the point where the moon wrench is gouging the metal of the adjust teeth/grooves). Incedentally, the unit will now not move to the left or the right. Is this a technique error? Has anybody experienced or heard of this before. What can I do to tighten it back to the right?

Thanks for responding.

 

shoot a bunch of PB Blaster around the area of the ring and the split next to the pinch bolt. after removing pinch bolt use a thin blade as a lever--carefully--to spread the housing apart just a fraction, and that will free up the assembly.........hopefully