Ti posto il contenuto del file web.config del mio sito.

Spero possa servire.

<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
<connectionStrings>
<add name="ASPNETDBConnectionString1"
connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirector y|\ASPNETDB.MDF;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<authentication mode="Forms" />
<roleManager enabled="true">
<providers>
<remove name="AspNetSqlRoleProvider" />
<add connectionStringName="ASPNETDBConnectionString1"
applicationName="/"
name="AspNetSqlRoleProvider"
type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
</providers>
</roleManager>
<compilation debug="true" strict="false" explicit="true"/>
<pages>
<namespaces>
<clear/>
<add namespace="System"/>
<add namespace="System.Collections"/>
<add namespace="System.Collections.Specialized"/>
<add namespace="System.Configuration"/>
<add namespace="System.Text"/>
<add namespace="System.Text.RegularExpressions"/>
<add namespace="System.Web"/>
<add namespace="System.Web.Caching"/>
<add namespace="System.Web.SessionState"/>
<add namespace="System.Web.Security"/>
<add namespace="System.Web.Profile"/>
<add namespace="System.Web.UI"/>
<add namespace="System.Web.UI.WebControls"/>
<add namespace="System.Web.UI.WebControls.WebParts"/>
<add namespace="System.Web.UI.HtmlControls"/>
<add namespace="System.Net.Mail"/>
<add namespace="System.Data"/>
<add namespace="System.Data.SqlClient"/>
</namespaces>
</pages>
<profile enabled="true">
<providers>
<remove name="AspNetSqlProfileProvider" />
<add name="AspNetSqlProfileProvider"
connectionStringName="ASPNETDBConnectionString1"
applicationName="/"
type="System.Web.Profile.SqlProfileProvider" />
</providers>
<properties>
<add name="Nome" type="string"/>
<add name="Cognome" type="string"/>
<add name="Nato" type="date"/>
<add name="Sesso" type="string"/>
<add name="Naz" type="string"/>
<add name="Citta" type="string"/>
<add name="News" type="boolean"/>
</properties>
</profile>
<membership>
<providers>
<remove name="AspNetSqlMembershipProvider" />
<add connectionStringName="ASPNETDBConnectionString1"
enablePasswordRetrieval="true"
enablePasswordReset="true"
requiresQuestionAndAnswer="true"
applicationName="/"
requiresUniqueEmail="true"
passwordFormat="Clear"
maxInvalidPasswordAttempts="5"
minRequiredPasswordLength="6"
minRequiredNonalphanumericCharacters="0"
passwordAttemptWindow="10"
passwordStrengthRegularExpression=""
name="AspNetSqlMembershipProvider"
type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
</providers>
</membership>
<globalization culture="it-IT" uiCulture="it-IT" />
</system.web>
<system.net>
</system.net>
</configuration>