More information...
I can't remember now but something tells me that I supplied API keys for my real merchant account when I installed PS4. I'm positive that I've seen the check box to force PS4 into testing mode and it's checked but the API key is set for a real Paypal account and not a sandbox account. Right now I can't find the screen where the testing checkbox is located in storemanager or where you submit the API key!!
HELP!!