blob image in rtf

Hi,

I have a report in BIP, which is having Clob data for a image and I am using the same tag in rtf to display the image as below.

<fo:instream-foreign-object content-type="image/jpg">

<xsl:value-of select=".\\Front_Image" />

</fo:instream-foreign-object>

But when image is null due to some conditions, the remaining static data in the rtf is moving upward.

Can anyone help me how to make it stable, even clob image present or not.

Thanks,

Phanindra