Live update doesn't seem to be working NIS 2011

Hi All

 

                 I have noticed that liveupdate hasn't run for 4 days now, I have just turned the PC on and had to manually run liveupdate to get it to work, I have recently upgraded from nis 2010 and the upgrade went perfectly well, should I uninstall & reinstall?

 

Also I have just changed ISP's as I'm now using BT Infinity fibre optic broadband in the UK.

 

Thanks

 

Pete