BI Publisher CLOB image display

Hi

After searching for some info on how to include images in a report, I've made some tests with the following process :

-base64 retrieval

-display through <fo:instream-foreign-object content-type="image/jpeg" height="2 in" width="2 in"><xsl:value-of select="P_IMAGE"/></fo:instream-foreign-object>

When I use juste the field tag (P_IMAGE), I get the CLOB-text correctly. When going through the instream process, nothing comes out.

Is there some special way to encode the data to ensure a correct decoding ?

Thanks in advance

PM