First off, is your PayPal account a business account rather than a personal one? If it is, then you should check with PayPal to see if your country is able to accept credit cards. If it isn't you need to upgrade to a business account, or make a new business account - you can have both a personal and business account, but they cannot have the same email address.
To the best of my knowledge, all levels of business accounts have an option showing in the lower level of the checkout screen to use a credit card without having or making a PayPal account. But I think there may be some issues with some countries due to a high level of credit card fraud in the location.
Hope this helps you a bit.