it is normal for all afghan applicants to be put on AP for months even years. You cant do anything just to be patient and wait. one of my friends is in the same case as you are and he had his interview on november 2010 and it is almost three years he is waiting for his visa.
Issue with DS-230 Electronic Form
in National Visa Center (Dept of State)
Posted
it means you have to fill out the first part of form DS-230 and send it to NVC