problems with orders, please help

[shawnspookcity]

Hi...
My zen cart was setup and running perfectly fine (since October) until yesterday. Now, when customers try to use their credit card, it gives the following error:

"Your billing address is shown to the left. The billing address should match the address on your credit card statement. You can change the billing address by clicking the Change Address button."

"Your credit card could not be authorized for this reason. Please correct any information and try again or contact us for further assistance."

So I tried it with my credit card and it gives the same error.

Did something go corrupt in my source code, is this an issue with my webhost, or is this an issue with authorize.net?

Like I said, it worked fine since October, but stopped working yesterday (and I didn't fiddle with anything. I didn't do anything except get emails from annoyed customers).

Any help would be super appreciated.

[shawnspookcity]

Can anyone help?

[Ajeh]

So you were walking along with a site that has not been touched since october and working just fine ... and suddenly ... it began to rain ... er ... just stopped taking credit cards, including your own ...

Now you have not changed code or databases or servers or anything that you are aware of ...

Can you check if your host has changed something? New php version or new MySQL version or anything?

Any secure certificate issues?

[shawnspookcity]

My email was down yesterday, so it is possible the whole server was down for some reason or another.

Is there something specific I should ask the tech support people? From past experience, they are sortof dumb.

Thanks.

[shawnspookcity]

Oh, and pretty much I was just minding my merry business when I got notice of the issue. I changed nothing on the site or code.

[Ajeh]

Find out if they made any changes to the server ...

It is a general question but we are looking for anything that might have changed ...