DL380 GEN8 installling oeratiing system probelem

Hi
I use Intelligent Provisioning to istall windows 2008 server R2 64 bit in DL380 GEN8 SERVER but when i finsh the wizrd it stay in sizing opeating system files stage !!!!!

I set the array 3 H.D.D RAID 5 and 1 for spare >

plese help me >