If you have not updated your *NetloadModuleSite list, the ones that come with Omar's installer is out of date. I believe the current valid sites are:

*NetLoadModuleSite "http://modules.shellfront.org/"
*NetLoadModuleSite "http://www.modules.ls-universe.info/modules/"
*NetLoadModuleSite "http://www.modules.nbi-studio.com/"

You should be able to find the lines to replace in your step.rc file.