For one thing if you are a Christian its pretty imperative that you believe in Satan. I don't of course. I am a partial Satanist though, LaVeyan of course.
You asked one question, yet gave an answer to a different. Do you believe in the devil is different that do you believe there is a devil.
If you are a christian, you believe they is one, but not in it. They are closely one in the same, but truly, they are still quite different. Depending on what level you interpret it.
I would say I do believe there is one, but I do not believe in him.
last year my bday was on 6/6/06 lmao but i dont belive in god im not a satanist its just alot of htings have happend to me and if god was there he woulda helped ive prayed and hoped to help me out with my problems but nothing ever happend so its w/e