Bob, LLC’s and Corporations vary in many different ways from structure, maintenance, taxes, functionality, duties, responsibilities, etc. As this is a fairly common question (understandably so!), I have a posted...
(a) You made a typo in the card number, CCV code, expiration date, name or address;
(b) Your card balance is too low;
(c) Issuing bank has declined this transaction for some other reason related to your account.