[galaxy-dev] Bug in "Export to File"

Hello, I am new here. I am running Galaxy at http://main.g2.bx.psu.edu/ using Mozilla Firefox 10.0.1 I try using "Export to File" tool on different files and workflows, and every time the report is: "Server Error An error occurred. See the error logs for more information. (Turn debug on to display exception reports here) " I don't know what to do, and I cannot find the option "turn debug on". best regards, :) Jerzy