voucher is expired now
Shows it as being registered with a serial in there so I guess it must be OK, thanks again.
Forget about Service Centre as its been replaced. Have a look on your NI account online and see if it is listed there as registered.
Added it in there too, says it's installed the full version but if I open service centre it says it isn't activated. I ram Mixcraft and rescanned all the VST plugin folders in case that would ask for the serial number but it hasn't done. Maybe it is registered after all as it says it is all up to date in the Native Access. Thanks anyway.
Service Centre has been replaced by Native Access so try downloading that and entering the serial which worked fine for me.