EBTax Rules Based on Tax Registation

Hi Gurus

I am sure many if you will be able to help on this.. Our business case is as below.

If a VAT supplier is registered as VFRS( Vat Flat Rate) Then all the purchases against that supplier will have a 3% tax rate applicable. What we have done is as below

1. created a supplier and updated his tax profile with a registration status as '' VFRS''

2. Created a rule to determine tax registration as ship from party

3. Created a Tax rate rule as below

     if the party ship from has a registration status as VFRS, 3% tax  as result

How ever when i create invoice, system do not see this and see no applicable rates and  hence doesnt calaculate any tax.. please advice how to apply a specific tax rate to based on certain  registration status..