Norton Speed Disk

I have had NIS 2009 for a while now and just today installed SystemWorks 12 Basic. All seems OK, but when I went to use Norton Speed Disk,  on analysis view it got to 95% and seemed to just stay there. How long should this take on a 250GB drive?

 

If I switch to the  Optimization map it says it has reloaded. OK, but when I then go back to the Analysis view again, it does not say 95% but 0%. What am I doing wrong here? How long should I wait?