Planning SW update to 2011; will pdmserver 2010 work if clients are 2011?

HI,

We are planning on updating to SolidWorks 2011 soon.  If we are at 2011 will be able to access the files on the PDMServer if it's at 2010, until we update it?  Had problems when we updated from 2009 to 2010 and PDMServer was still at 2009.

Tim

SolidworksWorkgroup Pdm