BF609 Eppi transmission problem by eppi2

I'm working on ADSP-BF609 Blackfin processor. I'm trying to send data to the video encoder (adv7343) of fixed image (720*576) through eppi2 at external clock frequency of 27 MHz and using internal frame syncs generation .Im using interlaced type and gp fs2 mode. I get the output as double the size of image (for example if the image has 32 lines default,the output im getting is only16 lines occupying 32 lines size.)

I'm using DMA and I hope the problem with the DMA only ..please suggest me the necessary DMA settings as well EPPI settings.

Thanks & regards