problem with FOP 0.9 and fo:external-graphics

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Hi all
I'm using fop 0.9 and i try to include a gif in my rtf file.
I tried with these tags but I had no solution:

<fo:external-graphic 
src="url(file:///C:/jakarta-tomcat-5.5.7/webapps/admin_console/images/printHeader.GIF)"
  content-height="200pt" content-width="200pt" />

<fo:external-graphic src="url(/admin_console/images/printHeader.GIF)"  
content-height="200pt" content-width="200pt" />

<fo:external-graphic 
src="file:///C:/jakarta-tomcat-5.5.7/webapps/admin_console/images/printHeader.GIF)"
  content-height="200pt" content-width="200pt" />
any idea?