A professor agreed on helping me with applying for a postdoctoral fellowship. However, after I wrote the application materials and send to him, he stopped replying to me. It is really just several days before the deadline now. And I started to feel frustrated. I don't know what I have possibly done wrong. Just thinking that I had already ask my professors for writing recommendations and I had devoted much time in proposing and writing the applications. I really don't want to waste them. Should I make a phone call to ask is there anything wrong? What would you suggest me to do?