I am using oscommerce 2.3.4. Currently, I am testing my shop against the sandbox. But it is always giving me "Things appear not working, please try it later". I hope I can have
1. Some guildline to know what am I testing step by step, because even decideing which api creditial is an issue for me.
2. visual explainations or youtube clip for details available?
3. Do I need a paypal button or can I use the "confirm" in my shopping cart to finish the checkout?
