I built my own computer and it won't install windows vista?

I built my computer running a GIGABYTE GA-MA770T-UD3P AM3 AMD 770 ATX AMD Motherboard, a AMD Phenom II X4 955 Black Edition Deneb 3.2GHz Socket AM3 125W Quad-Core Processor Model HDZ955FBGIBOX, a Western Digital Caviar Black WD7501AALS 750GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive - OEM, G.SKILL 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory Model F3-12800CL9T-6GBNQ, SAMSUNG Black 22X DVD Burner Black SATA Model SH-S223B - OEM. I have never had any problems like this before.