This field describes the current subscription state for this product.
               In the standard Radmin system, the available states are:
            
               - -blank-
                  User has no subscription and has never expressed an
                     interest in it. 
- Enquiry
                  User has made some enquiries about the product. 
- Wait for approval
                  User has ordered but not paid for the product.
                     Record the order details in the Notes 
- Trial
                  Temporary and short-term access to the product has been
                     granted. Will be automatically Expired at the end of the Valid To
                     period. 
- Approved
                  Access to the product has been granted. Will be
                     automatically Expired at the end of the Valid To period. 
- Expired
                  The Valid To date has passed, and the product has been
                     automatically expired 
- Disabled
                  Access has been temporarily disabled. Record the reason
                     why in the Notes. 
- Transferred
                  The access privileges have been transferred to another
                     user. Record the user in the Notes 
- Closed
                  Access has been permanently closed. Record the reason why
                     in the Notes. 
When you add enable a subscription (i.e. in Trial or Approved states),
               the user will be able to access the protected web pages between the ‘Valid
               From’ and ‘Valid To’ dates. At the end of their subscription period the
               expire program will change their State to Expired, automatically remove
               them from the access password file, and they wont be able to access the
               protected web pages any more.
            The other states (Enquiry, Wait for approval etc.) are place-holders
               that allow you to record where you are in the sales cycle for this product
               to this customer. Access to the protected area is only possible in Trial
               and Approved states.
               
                  Tip
                  if multiple subscription products are
                     configured with the same non-empty Product Group name, then only one of
                     those products can be enabled at any time. If you attempt to enable more
                     than one such product, you will receive an error message and the user will
                     not be updated.