如何在Iis服务器上将Web配置文件更改为主机

在iis7.5上托管我的网站时我收到以下错误

无法识别的属性'targetFramework'。请注意，属性名称区分大小写

at line

< compilation debug =truetargetframework =4.0>



我的网络配置文件包含

while hosting my website on iis7.5 i am getting following error
Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive
at line
<compilation debug="true" targetframework="4.0">

my web config file contains

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <connectionStrings>
        <add name="dbconn" connectionString="Dsn=recruitment;uid=sa" providerName="System.Data.Odbc" />
    </connectionStrings>
    <system.web>
        <httpHandlers>
            <add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" validate="false" />
        </httpHandlers>
        <compilation debug="true" targetFramework="4.0">
            <buildProviders>

            </buildProviders>
            <assemblies>
                <add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
                <add assembly="System.Web.Extensions.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
                <add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /></assemblies></compilation>
    </system.web>
    <system.webServer>
        <validation validateIntegratedModeConfiguration="false" />
        <handlers>
            <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
        </handlers>
        <directoryBrowse enabled="true" />
    </system.webServer>
</configuration>