Sometimes a software program will require registered globals turned on. OsCommerce uses registered globals and you will need to add a php.ini file to your folder directory. First you will need to create a file called php.ini. This is very simple to do as you can use any text editor to create the file. Open notepad and add the following at the top of the file
register_globals=on

Now save the file as php.ini and add it to your osCommerce directory. Do not forget to add it to your admin folder as well. Set the permissions on php.ini to 666. Make sure you do this for security reasons. To set the permissions you can login to cPanel and click the file manager icon. Next click the folder name to set permissions. Once you click the folder or file at the top right you will see a permissions links. To do these with ftp just right click on the file that you uploaded and choose properties.