MY PAYPAL IS NOT WORKING ON MY ECWID WEBSITE

[eternitycentral]

EVERYTIME I TRY TO MAKE A TEST PAYMENT ON MY WEBSITE BEFORE GOING LIVE 

I PUT MY VISA CARD INFORMATION AND MAKE THE PAYMENT BUT THE PAYMENT DOES NOT GO THROUGH AND I GET A POP UP OF RETURN TO WEBSITE

MY PAYPAL ACCOUNT IS BUSSINESS BUT STILL CANT MAKE PAYMENT