every time i try to download Gof of war 3 demo it says a error has occured and i don't know what to do anyhelp?

Well i need help since i still cant download it whats going on i want to be hyped but i need the demo....

This may have something to do with the hardware error of the fat ps3s.When did you try to download it last time? It may work now...

no my ps3 is a slim and i tried downloading it when it came to the psn store and i failed and failed again and again,this really sucks because like 2 weeks ago i wanted to get my hands on the demo but i needed to buy the collection,distric 9,or europe voucher code and when i heard it was coming to the psn and i could download i was like "FUCK YEA!!!!!!!!!!"but now i cant download it for some strange error
I need help