How to setup SKU in ProfitNx?

SKU use only Classification in product master .Without classification not use SKU. and SKU add in new year and new company. Step 1) Go to Environment Setting > Product . Step 2) Then select YES in the SKU No Required. Step 3) Then Make a new Product and select the Classification after that show option Required SKU No and select that. Step 4) After that go to Master > Product > SKU Master Step 5) And select the combination which you want to use in SKU and then make SKU. Step 6) Press Save (F2).