ReportViewer httphandler in web.config

I have developed some reports using the ReportViewer control. Visual Studio puts the required httphandler into web.config and all works fine on my dev machine. When uploading to the hosting service, the httphandler in the web.config causes a 500 Internal Server error. Why would the hosting service not support reporting? Is it something they could install? What files are needed?
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.

            Visual Basic options:
            Set strict="true" to disallow all data type conversions 
            where data loss can occur. 
            Set explicit="true" to force declaration of all variables.
        <add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
          validate="false" />
      <globalization culture="en-GB" uiCulture="en-GB"/>
        <compilation debug="true" strict="false" explicit="true">
            <add extension=".rdlc" type="Microsoft.Reporting.RdlBuildProvider, Microsoft.ReportViewer.Common, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
          <customErrors mode="Off" />
                <clear />
                <add namespace="System" />

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Ryan ChongConnect With a Mentor Commented:
try download and install:

or the equivalent latest supported version on your machine.
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