麻烦您帮我调试一下吧？我实在不知道怎么才能运行了，总是说无效值！

<?xml version="1.0" encoding="utf-8"?>
<configuration >
<appSettings>
<add key="SMS_dbconn" value ="server=.;Pooling=true;Min
Pool Size=10;Max Pool size= 200;packet size=4096;data soure
=(local);initial catalog=SMSstudent; uid =sa; pwd=sa" />
<add key="CrytalImageCleaner-AutoStart" value="ture" />
<add key="CrystalImageCleaner-Sleep" value="60000" />
<add key="CrystalImageCleaner-Age" value="120000" />
</appSettings>
<system.web>
<compilation defaultLanguage="C#" debug="true">
<assemblies>
</assemblies>
</compilation>
<authentication mode="Windows">
<forms name="AuthCookie"

loginUrl="Login.asp"></forms>
</authentication>
<allow users="?" />
<authentication>
</authentication>
<trace enabled="false" requestLimit ="10"

pageOutput="false" traceMode="SortByTime"

localOnly="true"/>
<sessionState mode="InProc"

stateConnectionString="tcpip=127.0.0.1:42424"

sqlConnectionString="data source = 127.0.0.1;
Trusted_Connection=yes" cookieless = "false"

timeout="20" />
<globalization requestEncoding="utf-8"

responseEncoding="utf-8" />
<httpRuntime maxRequestLength="4096"

executionTimeout="60" appRequestQueueLimit="100" />
<siteMap defaultProvider="defaultSiteMap">
<providers>
<add
name="defaultSiteMap"
type="System.web.XmlSiteMapProvider"
siteMapFile="~/Web.sitemap" />
</providers>
</siteMap>
</system.web>
</configuration>

<authentication mode="Windows">
<forms name="AuthCookie"

loginUrl="Login.asp"></forms>
</authentication>
<allow users="?" />
<authentication>
</authentication>

就错在这里了！心别乱也别闹，静下心来才能发现问题所在！