Simulation 2009 update

Hi, I have installed Solidworks 2009 SP0 with Simulation, andit works fine...If I upgrade to SP3.0 Simulation module says it isnot compatible with Solidworks installation. If I upgrade to SP2.1, Simulation module it says it cannot load... I checked thefiles and the registry and everything looks ok... For all theseinstallations, I couldn't update Simulation because it says it isnot available for download, so simulation is SP0...
Does anyone has any ideea why Simulation doesn't work with other SPthen SP0.SolidworksAdministration