Difficulties with SqlProfileProvider - where to get the SettingsContext object from?

Hello,
I am tryng to use the built it Providers (Membership, Profile etc.). I have problems with SqlProfileProvider. I try to run exampe code from: http://msdn.microsoft.com/en-us/library/system.web.profile.sqlprofileprovider.setpropertyvalues(VS.80).aspx
1 SqlProfileProvider p =
2 (SqlProfileProvider)Profile.Providers["SqlProvider"];
3
4 SettingsPropertyValueCollection pvalues =
5 p.GetPropertyValues(Profile.Context, ProfileBase.Properties);
6
7 pvalues["ZipCode"].PropertyValue = "98052";
8 pvalues["CityAndState"].PropertyValue = "Redmond, WA";
9
10 p.SetPropertyValues(Profile.Context, pvalues);
...