Install from Cpanel - Missing optional binary pnmcomp.

I have tried to install 1.4.4 pl-5 from a CPanel at www.milwaukee2005.com However, there is a problem with NetPBM, on the 1st step of the wizard i get the follow message:

Warning

Missing optional binary pnmcomp. Without pnmcomp gallery will not be able to watermark images, except you use ImageMagick and have the composite binary installed.

12 of 13 NetPBM binaries located.

I have seen this in other topics but none seem to give the right solution.
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The following information is required to get an answer:
Get this information from the PHP diagnostic PHP
Gallery URL (optional but very useful): www.milwaukee2005.com/pictures
Gallery version: 1.4.4-pl5
Apache version:
PHP version (don't just say PHP 4, please): v4.3.11
Graphics Toolkit: Netpbm
Operating system: XP
Web browser/version (if applicable): Firefox