Exported Interlaced Video by SDK Exporter plugin for premiere pro cs6

Adobe Premiere Pro CS6 for Project Setting Sequence is XDCAM HD422 1080i25(50i)

I tested the Plugin AVI(Uncompress) ,output interlaced video OK no problem.

I use Premiere Pro CS6 r2 SDK

I am trying to build a plugin for interlaced video.

Problem occured when I modified by the program below:-

SDK_Exporter.cpp at subroutine RenderVideoFrame

for interlaced video with PrPixelFormat_BGRA_4444_8u or PrPixelFormat_VUYA_4444_8u

and set

renderParms.inRenderQuality = kPrRenderQuality_High;

fieldType.value.intValue = prFieldsUpperFirst;

mySettings->exportParamSuite->ChangeParam(exID, 0, ADBEVideoFieldType, &fieldType);

renderParms.inDeinterlace = kPrFalse;

renderParms.inDeinterlaceQuality =kPrRenderQuality_High;

SequenceRender_GetFrameReturnRec renderResult;

    resultS = mySettings->sequenceRenderSuite->RenderVideoFrame(mySettings->videoRenderID,

                                                                videoTime,

                                                                &renderParms,

                                                                kRenderCacheType_None,

                                                                &renderResult);

    mySettings->ppixSuite->GetPixels( renderResult.outFrame, PrPPixBufferAccess_ReadOnly, &frameBufferP);

In frameBufferP is only progressive frame not intelaced frame

Please advise  what should I do in order to get interlaced frame.

Regards,

Putaporn