I am using Samsung Notebook NP300V5A. and Wifi is: Wireless LAN Intel 802.11 abg/n. I had installed Max Ox Lion 10.7.3. My wifi and sound and FireWire is not working

My PC configuration is as follows:
CPU/ Processor Intel® Core™ i5-2450M Processor
CPU Clock Speed (Max.) 2.45 GHz
CPU Cache 3 MB L3
Series Series 3
Model Number NP300V5A-A0EUS
Category Mainstream
Screen Size 15.6"
Resolution 1366 x 768
Brightness 220 nit
Memory Standard System Memory 6GB
Memory Type DDR3
Max. System Memory 8GB
Graphics Chip Intel® HD Graphics 3000
ODD DVD +/-RW Super Multi Dual Layer (S-ATA)
Wireless LAN Intel 802.11 abg/n
Bluetooth Bluetooth v3.0 High Speed
WiDi Yes
Wired Ethernet LAN Gigabit LAN
Keyboard 103
Touch Pad Yes
Kensington Lock Slot Yes
AC Adapter 90 Watt
Number of Cells / Cell Type 6 Cell / Li-Ion
Battery Life*6.2H