403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied. asp.net web form

I have a site with asp.net web form. I put the essential folders and file into the host but I encountered this error.

Is any body here to help me what should I do? this is my config file

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <connectionStrings>
    <add name="9947_shopcart" connectionString="Data Source=185.88.152.177;Initial Catalog=9947_shopcart;User ID=[redacted];Password=[redacted]" providerName="System.Data.SqlClient" />  
 </connectionStrings>
  <system.web>
    <compilation debug="true"/>
    <customErrors mode="Off" />
    <compilation targetFramework="4.5">
      <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>
    <httpRuntime targetFramework="4.5" />
  </system.web>

  <system.webServer>
    <directoryBrowse enabled="false" />
        <defaultDocument>
            <files>
                <clear />
                <add value="index.php" />
                <add value="Default.htm" />
                <add value="Default.asp" />
                <add value="index.htm" />
                <add value="Default.aspx" />
            </files>
        </defaultDocument>
        <httpErrors errorMode="DetailedLocalOnly" existingResponse="Auto" />
  </system.webServer>
</configuration>