I can not get authorize.net to see my oscommerce orders

[nec web site]

on my home page of the catalog my os commerce, it sais:

elcome Guest! Would you like to log yourself in? Or would you prefer to create an account?

This is a default setup of the osCommerce project, products shown are for demonstrational purposes, any products purchased will not be delivered nor will the customer be billed. Any information seen on these products is to be treated as fictional.'

 

I already set up store items and I can buy with yesy credit cards and get a verification e-mail. the problem is that nothing goes to authorize.net I have called them 3 times and they say they would see the transactions if they were going through. Also, that first part the creen above about demonstarational purposes is not good' How do I fix it so that goes away and I can sell. Thanks, Allen