Reported Memory Size in Norton Utilities 2004, Win Doc, System info is wrong. Says 2 GB, I have 4 GB

 

Norton Utilities reports my memory size as 2Gb, I have just installed 4 GB.

Win XP Pro, SP 3, 32 bit, System works 2004.

Windows System Information and bios reports it correctly as 4Gb installed.

 

Running Win 7 on a virtual drive and it is correct as well.

 

Is there a setting or a register setting that needs changing?