<qa>  What is the purpose of this study?The purpose of this study is to evaluate the safety and tolerability of an experimental HIV vaccine. The vaccine will be given with or without IL-12 DNA adjuvant at three escalating doses of 100, 500, and 1,500 mcg respectively, a substance that helps the body respond to a vaccine. This study will also determine the safety and tolerability of an experimental HIV vaccine boosted with two adjuvants. 