I did not set up my zencart but I did have paypal issues so let me explain my experience.
I have 3 zencarts.
#1 retail
#2 wholesale
#3 different business altogether
On site #1 we have paypal set up and it works great.
I tried to set paypal up on sites 2 & 3...all seemed well..
we would receive our money but no orders were registering in the shopping carts...nothing...and the only email I received was from paypal letting me know that we had a payment!
So after much frustration I called paypal...and this is what they said.
Because we have paypal set up on site #1 and we only have the one business checking account that paypal can NOT be set up on sites 2 & 3!!
In order to set up paypal on sites 2 & 3 I would have to register with 2 more separate checking accounts....
bah I said...thats not gonna happen.
So now we have instructions (that people never seem to read even though its the first thing you see!) on sites 2 & 3 explaining the paypal issue and to select cash on delivery when placing their order. We then issue them a paypal invoice that they can pay from.
So my question to you is....
does this person have paypal set up on another website? If they do you wont get it to work on this site unless they set up their paypal using a totaly different checking account!
How dumb is that!
(i really hate paypal but we do have customers that insist on using it!)