HELP: Can't adjust ride height-Coilover is stuck!

[SmogSUX]

Anyways I need to raise the ride height on my car and I have KTS coilovers.

http://splparts.com/main4/parts/FC3S...on/default.htm

The lower silver sleeves or w/e you call them spin to move up or down the threads so you can lower or raise your car's height. Anyways I managed to adjust all of them, but one of them is stuck...I simply can't get it to budge. I'm using the 2 blue callars that hold the spring up to pivot on and putting a tire iron through the hole on the bottom of the silver collar. (It's the rear strut) I've let it soak in PB Buster for hours on end and have tried heating it up with a torch, etc...I just can't get it to budge...anyone have any ideas on how to get it to move? I'd even be willing to take it to a shop if I knew which one to take it to and had assurance that the strut won't be damaged.

-I have cleaned it all off to remove any gravel and dirt too...
-I know this is for an FC, but the coilover is pretty much the same design for my 240.