I have an xaction that shows a flash chart.
If I run a sql the results are displayed correctly but I want to pass a JSON as a parameter.
Then I've modified the xaction.

Code:
<inputs> 
    <use_pentaho_xml type="string"> 
      <sources> 
        <request>use_pentaho_xml</request> 
      </sources>  
      <default-value><![CDATA[false]]></default-value> 
    </use_pentaho_xml>  
    <chart_width type="string"> 
      <sources> 
        <request>chart_width</request> 
      </sources>  
      <default-value><![CDATA[600]]></default-value> 
    </chart_width>  
    <chart_height type="string"> 
      <sources> 
        <request>chart_height</request> 
      </sources>  
      <default-value><![CDATA[550]]></default-value> 
    </chart_height>  
    <jsonData type="object"/> 
  </inputs>

  ....
  
    <actions> 
    <action-definition> 
      <component-name>com.google.code.pentahoflashcharts.OpenFlashChartComponent</component-name>
      <action-type>Open Flash Chart</action-type>
      <action-inputs> 
        <chart_dataset type="object" mapping="jsonData"/>  
        <use_pentaho_xml type="string"/>  
        <chart_width type="string"/>  
        <chart_height type="string"/> 
      </action-inputs>
      <action-outputs> 
        <html_fragment type="string"/>  
        <content_url type="string"/> 
      </action-outputs>
      <component-definition/> 
    </action-definition>
But it displays the following error:

Code:
2009-06-09 14:41:19,497 ERROR [org.pentaho.platform.engine.services.runtime.RuntimeContext] d4afe73f-54f2-11de-b4b3-4567e7e16140:RUNTIME:context-32888367-1244551279481:linechart.xaction RuntimeContext.ERROR_0018 - [es_39] The requested parameter jsonData could not be fulfilled
2009-06-09 14:41:19,497 ERROR [org.pentaho.platform.engine.services.runtime.RuntimeContext] d4afe73f-54f2-11de-b4b3-4567e7e16140:RUNTIME:context-32888367-1244551279481:linechart.xaction RuntimeContext.ERROR_0018 - [es_39] The requested parameter jsonData could not be fulfilled
2009-06-09 14:41:19,497 ERROR [org.pentaho.platform.engine.services.runtime.RuntimeContext] d4afe73f-54f2-11de-b4b3-4567e7e16140:RUNTIME:context-32888367-1244551279481:linechart.xaction RuntimeContext.ERROR_0013 - [es_29] Parameters could not be resolved
.....
Any suggestions?