More Paypal issues with PPV


Having problems completing any transactions using PPV. The first button just refreshes the post and gave this error msg at the end of the post:

There was a problem connecting to PayPal to setup your purchase. Please try again.

10002 – Security error – Security header is not valid

The other two buttons connects to paypal but once I enter the sandbox p/w it gave the following error on paypal:

The link you have used to enter the PayPal system is invalid. Please review the link and try again.

I read somewhere that I should test it with a Live setting but I’m really not sure how to do this without incurring any cost on my part.

The PPV post can be found here:

Please help.