internet tethering not working

hi,
i have a z10 and it was working great till now.i was using internet tethering option by usb to connect to internet in my laptop.it was working well without issues till now, but now if i turn on internet tethering option blackberry link gets disconnected and in my pc it shows limited connection on ethernet,,
could anybody help me with this

Hi and welcome to CB. Have you rebooted both? Does your carrier provide tethering as an option? If not they could have shut you off.