Here it is (I don't know what version you have of ASP.net 2.0, but this is how you specify it with the latest released build)
<webParts>
<personalization defaultProvider="AspNetSqlPersonalizationProvider"></personalization>
</webParts>
/Fredrik Norm?n NSQUARED2
Microsoft MVP, MCSD, MCAD, MCT
CornerstoneMy Blog, ASP.Net 2.0 etc