Forum:Informations 'bout pearlescent weapons and Crawmerax

Please I need some answers... I killed over 40 Crawmerax, alone without cheats, with a +4 scavenger mod and +5 ransack. I NEVER found any pearlscent weapon... now, I'm starting to think that my game just want to f*** me and joke me... Is that normal or I just have to submit and delete the game???