cfchart HTML format not available

Question

I'm trying to use cfchart with html format:

<cfchart format="html" type="bar" chartHeight="600" chartWidth="1100" title="Sales Chart"
   font="Arial" fontBold="true" fontSize="13"
>
    <cfchartseries type="line" seriesColor="##3232FF">
        <cfloop query="getData">
            <cfchartdata item="#Date#" value=#sales#>
        </cfloop>
    </cfchartseries>
</cfchart>

However, it is returning the error:

Client Side Charting is not available in this edition of ColdFusion server. 

I'm using CF10 and I control the server. How can I enable the cfchart format HTML? BTW, if I change the format to png, it works.