當我設定Web.config 認證時ScriptManager 失效

摘要:當我設定Web.config 認證時ScriptManager 失效

1. 原先Web.config 設定
  <authentication mode="Windows"/>
ScriptManager+UpdatePanel 運作正常
選擇DropDownList也不會refresh畫面

2.可是加入下列行後
    <sessionState mode="InProc" stateConnectionString="tcpip=127.0.0.1:42424" stateNetworkTimeout="10" sqlConnectionString="data source=127.0.0.1;Integrated Security=SSPI" cookieless="false" timeout="50"/>
    <globalization requestEncoding="big5" responseEncoding="big5"/>
    <xhtmlConformance mode="Legacy"/>
    <httpRuntime executionTimeout="90" maxRequestLength="2097151" useFullyQualifiedRedirectUrl="false" minFreeThreads="8" minLocalRequestFreeThreads="4" appRequestQueueLimit="100"/>

    <authentication mode="Forms">
      <forms name=".ASPXUSERDEMO" loginUrl="login.aspx" protection="All" timeout="60"/>
    </authentication>
    <authorization>
      <deny users="?"/>
    </authorization>
選擇DropDownList就會refresh畫面,畫面閃了一下

請位各位大大事什麼原因
先謝謝了