The prospect is already doing business with someone she is satisfied with. The prospect doesn't see you as important enough to carve out time to meet. The prospect has an unfavorable impression of you, your company, or your product. Find someone you know who knows who you want to appoint. Use the fax to open the door.
Flowers can get through a brick wall no matter how thick it is.
The right gift basket will bring remarkable response. Find out what your prospect likes. Ask the prospect's administrative person or sales team. Don't sell your product, just pique interest and sell an appointment. The best time for this is before the day begins or after the day is over.