There are 3 mandatory updates for the NI FIRST Robotics Software 2011 and they should be installed in the following order:

LabVIEW Update - http://joule.ni.com/nidu/cds/view/p/id/2261
Utilities Update - http://joule.ni.com/nidu/cds/view/p/id/2262
Driver Station Update - http://joule.ni.com/nidu/cds/view/p/id/2263/lang/en