Plot development freeze

[Mile High Dale]

     I find myself in something of a puzzling situation. I started writing short stories (20-30 pages) over the holidays and worked my way up into the mid seventies in length. When I finished my last story I had a good idea for my next writing project. I started a story involving my main character's Grandfathers meeting in the Korean War. The first four pages of that story were easily drafted and then the whole plot basically fell apart infront of me as I was typing. I like the first four pages but am at a complete loss as to how to move forward. I have a basic outline of what I thought I wanted to do but now when I look at it I see, "He goes here..." "He does that..." and is about as interesting as reading US Tax Code Laws. Any ideas?