Actually, by default the allowpersonalization field is set to false for
all web part zones on area. So for any area you want to personalize, you
have to go to its default.aspx file and set allowpersonalization = true
for the web part zones which you want to personalize. For example for
home area the file is C:\Program Files\Common Files\Microsoft Shared\web
server extensions\60\TEMPLATE\1033\SPS\default.aspx