Toolbox disappears

Hi,

When I add in the Fastener Toolbox and go through the configuration of it, I am able to add fasteners to my assembly, however the next time SolidWorks is started the Toolbox is gone and I get the message it needs to be added in and configured.  How do I make the Toolbox add-in stick?

SW Premium 2010 x64 SP4.0

Thanks

SolidworksParts And Features