Cant install audio drivers in my sony laptop

Hello,

i have a sony vaio laptop with VGN-NW270F model number recently i installed windows 2003 server and few other softwares(ECC 6.0) since then i lost audio i tried to install drivers seperatly but when i try to install its saying that it can only be installed on windows 7...............
please help me resolve this issue .........

thank you so much in advance..........