Python error on ArcGIS Server 10.0

[BarryGuidry]

When attempting to run David Spriggs' ExportPDF GP service, an error is created. From the log file, this is what is displayed:

Executing (ExportToPDF): ExportToPDF -13068897.3480829 3052589.16159596 -8969426.64709337 5236853.68187258 102100 9244648.868618 {"World_Imagery":false,"World_Street_Map":true} Landscape8x11 false "My Map" "Feature Set" "Feature Set" "Feature Set" Start Time: Wed Apr 03 13:47:43 2013 Running script ExportToPDF... : No module named os Failed to execute (ExportToPDF).

I don't know much about our server, as IT manages it, but was told it is a virtual server. Could I modify the first part of code in the Python script

import arcpy, os, json

to possibly work another way?