Problems upgrading to Norton 2009

I currently have Norton 2005 installed and as it is time to renew for this year, I decided to upgrade to 2009.  However, I am having problems because I can't seem to get rid of the 2005 version in order to install 2009.  I have tried unistall through Add/Remove Programs and I have tried the Norton Removal Tool.  Both of them end up stuck, unable to go further but without giving any error messages.

 

Any solutions gratefully received

 

faringtonwhite