Media disconnected

hi all, new ti his forum

i have a notebook connected wirelessly to a linksys router via a usb adapter. currently i cant connect to internet.

i did a ipconfig in command prompt. i found out that my media was disconnected. then i went to check the status of my usb adapter in device manager. i found out the device is working properly. i did a hard reset on the router. uninstall and reinstall the usb adapter. everything don seem to work. However it works fine with a wired connection.

can anyone tell me how should proceed on ?