How to display the fields dynamically in OAF

Hi All,
I have developed a OAF Page and it has one table region and has 5 rows on it.One of the field on the table is Message Choice.
The requirement is,If I select "Parts" then Lov Field should be displayed and If I select "Services" then one text field should be appear on that perticular table row.
I have created a PPR on Message Choice and done the coding as follows,but it is not working;
Please help me to achive it.
if("lineChange".equals(pageContext.getParameter(OAWebBeanConstants.EVENT_PARAM)))
String rowReference =pageContext.getParameter(OAWebBeanConstants.EVENT_SOURCE_ROW_REFERENCE);
OARow row = (OARow)am.findRowByRef(rowReference);
String claimCategory = (String)row.getAttribute("ClaimLineType");
if ("Parts".equals(claimCategory))
row.setAttribute("ClaimPartNoLovRender", Boolean.TRUE);
row.setAttribute("ClaimPartNoRender", Boolean.FALSE);
else
row.setAttribute("ClaimPartNoRender", Boolean.TRUE);
row.setAttribute("ClaimPartNoLovRender", Boolean.FALSE);
Please let me know if there are any other ways to achive the same.
Thanks in Advance..

You might have the wrong forum. This forum is on IOP.

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