Below are hosting companies I know of that my products will and will not work with. If you don't see your hosting company below, contact your host and ask them if your hosting plan meets the product requirements.
If you are looking for a new host, I highly recommend Saratoga Hosting for server speed, quality, security & service.
Will work on these hosting companies
This is not a recommended list, just hosting companies I am aware of.
** 1and1 linux hosting only. Their windows hosting do not include MySQL databases. ALSO they have a limit on their PHP memory they won't raise which means you will not be able to upload photos over approx 2MB.
Will NOT work on the following hosting companies
You will notice godaddy on both lists. They have both windows hosting and linux hosting. Their windows hosting has many restrictions causing Photo Cart & WebSite:D not to work. If you are currently using their windows hosting, they can move you to a linux server