Does anyone else have this installation problem and or how to fix it?

Ok, I just recently purchased a Sony 80GB PS3 yesterday. And I downloaded the Battlefield 1943 demo which worked perfectly. Now today I tried downloading 2 different demos. I let it download fully and then when I go to Install them they both say an error has occured during the installation (and then some numbers). This happens everytime when the installation gets to 15%. I tried redownloading them, calling sony but neither helped. Now other people I have heared had these problems and they said to download them normally. Not in the background. Please Help!!!!

Ok, I just recently purchased a Sony 80GB PS3 yesterday. And I downloaded the Battlefield 1943 demo which worked perfectly. Now today I tried downloading 2 different demos. I let it download fully and then when I go to Install them they both say an error has occured during the installation (and then some numbers). This happens everytime when the installation gets to 15%. I tried redownloading them, calling sony but neither helped. Now other people I have heared had these problems and they said to download them normally. Not in the background. Please Help!!!!

M3RCc

Turn off Ps3 Media Server in settings.