[newapollo]

According to the community forums of VM it's a network error, and the following workaround has fixed it for most people.

Access your Virgin Media account online
go to myapps
go to web safe
turn on both the virus and child safe options
restart your V6 box
test your internet on the V6, youtube / iplayer
launch your netflix app, login
turn off your child safe option, suggest leaving on the virus one though.
your netflix should now be working