Now - what do you do now? - What they have now will tell you what they will want in the future.
Enjoy - What do you like about what you are doing now. - How they feel tells us if our product is in or out of the limitations.
Alter - What would you like to alter about what your doing now. - Qualities needed to close the sale.
Decision - Who in addition to yourself will make the final design? - Have them tell us they are the final decision maker.
Solution - If we are fortunate enough today to find a solution that fits your needs, would you be in a position to proceed? - How will soon will they make a decision.