xbox power brick lr1106 250w 12v

Hey forum members First of all, this is a cool website. It gave me a lot of ideas. Last week i started to build my own custom mini ITX config. I used a stock XBO 360 203W power brick and a 250W 12V chinese (maybe realan) 1106 psu from ebay. The problem is, my config shuts down immendiately when...