Interfacing arduino with asus eeepc with 7

Hi guys, i am triyng to code from my asus eeepc (netbook). I can't open the comport menu (is gray, not selectable) in arduino ide. Please help me!!!!

In system manager / usb I find "usb composite device" i think is arduino, this is the address: Port_#0002.Hub_#0005

Do you have an arduino 2009 hooked up via USB port? If so does windows react when you plug it in and tell you you have new hardware?

It may be worth checking that the drivers are up to date. there's a description on the arduino download area of where to get them.