web config 404 problem

I am using visual studio express 2013 and when I try to test my site I get the 404 error. It says web config line 18 has already been added. I can't find where it has been added in any of the other sites.  

I am using windows 8.1 This site was up and now can't get it back up on my browser. Here is the page or part of it.

<?xml version="1.0"?>

<configuration>
  <configSections>
    <section name ="bumplesMagazine" type="EP.BumplesMagazine.BumplesMagazineSection, __code"/>
  </configSections>
  <bumplesMagazine defaultConnectionStringName="BumplesConnectionString">
    <contactForm mailTo="contact@bumples.com"/>
    <newsletters fromEmail="info@bumples.com" fromDisplayName="Bumples Magazine" />
    <store sandboxMode="false" businessEmail="sales@bumples.com" />
  </bumplesMagazine>
  <connectionStrings>
    <!-- Local -->
    <add name="BumplesConnectionString"
         connectionString="Server=server3000; Database=BumplesDataBase; uid=SERVER3000\Junior; Trusted_Connection=True;"
         providerName="System.Data.SqlClient"/>
    <!-- Remote -->
    <add name="BumplesConnectionString" connectionString="Server=mssql1.myregisteredsite.com; Database=27534_BumplesDatabase; User Id=27534_login; Password=9u3673s!; Trusted_Connection=False;"
         providerName="System.Data.SqlClient"/>
  </connectionStrings>
  <system.net>
    <mailSettings>
      <!-- <smtp deliveryMethod="Network"> 
      <smtp deliveryMethod="PickupDirectoryFromIis" from="support@bumples.com">
        <network defaultCredentials="true" host="(localhost)" port="25" />
      </smtp>
      -->
      <smtp from="info@bumples.com">
        <network host="smtp.bumples.com" password="gr!77y09" userName="info@bumples.com"/>
      </smtp>
    </mailSettings>
  </system.net>
  <system.web>
    hope some one can help me get the site back up at bumples.com

Thanks

Jennifer Sheehan