Rescuing Arthos

I have done everything in the quest but rescue arthos and another prisoner. They are behind bars in the prison and I can't figure out how to open the steel bars. HELP

Outside each level of the prison is a lever attached to a signal crystal - use the valve to open the main door to the prison, then pull the lever to open the cells.

Remember to clear a route back to the entrance for Arlos because he likes to pick fights with kobolds in a suicidal fashion.

Garth

Appreciate the info

also, don't jump on any crates on the way out, arlos will follow you up, and then get stuck, as he is unable to fall off the crates.

Hmmm, who is Arthos =) ?