Guest Posted June 23, 2009 Posted June 23, 2009 I have been fighting with osCommerce now for 3 days trying to get the shopping cart up and functional. I am working to do two things...one is to allow PayPal payments, the other is to install an add-on module for Internetsecure payments. I tested the site using the generic (not intended for production) credit card payment module and everything worked perfectly. I tried to add PayPal as a payment option and cannot process payments at all now. I get this red bar at the top that reads "Security Header is not valid." Then, as a separate issue, I have installed all the files for the InternetSecure payment module but it does not display in the module. Please help!!!! This site is intended to be live to sell tickets before our events which begin in July!
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