Primedice seems like a scam, everybody is saying it is? Like it's a trend, 7 of my friends told me not to play there, its rigged?
Ask you friends again, they would have asked you to not to gamble because ultimately you will loose your money(in the long run ofc). Although pd is completely legit and cannot do anything about you loosing. You might try reading about probably fair games here-
http://www.reddit.com/r/Bitcoin/comments/18rh3v/how_does_provably_fair_gambling_work/