se li uso insieme, nel web.config, funzionano, ma il controllo RequiredFieldValidator non va, non controlla su tutti i form!

codice:
       <rule name="RedirectUserFriendlyURL01" stopProcessing="true">
                    <match url="^autenticati/modifica_certificato\.aspx$" />
                    <conditions>
                        <add input="{REQUEST_METHOD}" pattern="^POST$" negate="true" />
                        <add input="{QUERY_STRING}" pattern="^id=([^=&amp;]+)$" />
                    </conditions>
                    <action type="Redirect" url="{C:1}" appendQueryString="false" />
                </rule>
                <rule name="RewriteUserFriendlyURL01" stopProcessing="true">
                    <match url="^([^/]+)/?$" />
                    <conditions>
                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                    </conditions>
                    <action type="Rewrite" url="autenticati/modifica_certificato.aspx?id={R:1}" />
                </rule>
      <rule name="LowerCaseRule2" stopProcessing="true">
        <match url="[A-Z]" ignoreCase="false" />
        <conditions logicalGrouping="MatchAll" trackAllCaptures="true" />
        <action type="Redirect" url="{ToLower:{URL}}" />
      </rule>
      <rule name="Elenco_redirect2" stopProcessing="true">
        <match url="^autenticati/elenco_certificati\.aspx$" />
        <conditions>
          <add input="{REQUEST_METHOD}" pattern="^POST$" negate="true" />
        </conditions>
        <action type="Redirect" url="elenco" appendQueryString="false" />
      </rule>
      <rule name="Elenco_rewrite2" stopProcessing="true">
        <match url="^elenco$" />
        <conditions>
          <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
          <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
        </conditions>
        <action type="Rewrite" url="autenticati/elenco_certificati.aspx" />
      </rule>