I am trying to do a test sale on my shopping card that has been setup for credit card processing with my processor being Eprocessing Network. My payment module that they had me install is authorize.net (SIM). They told me to use this instead of the EPN module. When I process the transaction via their secure site and hit submit I get the Whoops Your Session Has Expired message. EPN is trying to figure out why I am getting this so I thought I would post here as well. Any ideas or advice is greatly appreciated.

Thanks
Mark