PNG in FOP .95

[Peter D Sparkes]

Hi,

I am using fop 0.95 (inside cocoon 2.1) and when I insert a png image in fo:external-graphic   I get 
the following error:


   HTTP ERROR: 500 com%2Fsun%2Fmedia%2Fjai%2Fcodec%2FFileCacheSeekableStream

Help please


Peter Sparkes