i installed snow leopard on my amd and on snow leo i have no internet connection it doesn't detect it i have tried efi studio and it did not detect it

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HP Pavilion Slimline - s5202uk
Windows 7 Home Premium 64-bit
2xAMD Athlon™ II X2 215 Processor (2.7Ghz
1x3.00gb Ram
NVIDIA GeForce 6150SE nForce 430
Dedicated graphics memory 256 MB
20inch LCD Flatpanel HP 2009v
With 1600x900 resolution