I created and deployed a pretty simple WCF Service. but when accessing it from IE, I get this :

HTTP Error 500.19 - Internal Server Error
Description: The requested page cannot be accessed because the related configuration  
data for the page is invalid. 

Error Code: 0x80070005 

Notification: BeginRequest 

Module: IIS Web Core 

Requested URL: http://localhost:80/ProductsService/ProductsService.svc 

Physical Path: C:\Users\Administrator\Documents\Visual Studio 2008\Projects\ProductsService\ProductsService\ProductsService.svc 

Logon User: Not yet determined 

Logon Method: Not yet determined 

Handler: Not yet determined 

Config Error: Cannot read configuration file 

Config File: \\?\C:\Users\Administrator\Documents\Visual Studio 2008\Projects \ProductsService\ProductsService\web.config 

Config Source:    -1: 
                   0: 

More Information... This error occurs when there is a problem reading the  configuration file for the Web server or Web application. In some cases, the event logs  may contain more information about what caused this error.

here is the content of my web.config file :

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    </configSections>
    <dataConfiguration defaultDatabase="AdventureWorksConnection" />
    <connectionStrings>
        <add name="AdventureWorksConnection" connectionString="Database=AdventureWorks;    Server=(localhost)\SQLEXPRESS;Integrated  Security=SSPI"
            providerName="System.Data.SqlClient" />
    </connectionStrings>

  <system.serviceModel>
    <services>
      <service name="Products.ProductsService">
        <endpoint address=""
        binding="basicHttpBinding"
        contract="Products.IProductsService" />
      </service>
    </services>
  </system.serviceModel>

</configuration>