I have been facing a problem in digg is that When I submit my story it comes that it is submitted and will be in news section in few minutes but It did not come even after a day..What is wrong with my submission ?
You can check your submissions in your profile and history. They are immediately shown in your profile, not all stories make it to first page.
I use Digg myself and judging by how many other people submit thier content in a single minute, chances are your posting got burried. That's not a bad thing, though... Just go under your Digg profile, locate your content and have your friends "Digg" it to increase its ranking. The quicker you do this, the better. If you don't do it immediatly after submitting your content, then it won't be very effective.