HIDPOINT and missing libpng.so file

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http://www.linuxquestions.org – I am trying to install HIDPOINT for my wireless keyboard. Install issue stating: can not find libpng.so file in /usr/lib directory. There is not a libpng.so file in this directory but there is one in the directory /usr/lib/compiz . Is there a conflict with Compiz, should I link to this file from /user/lib? or should I download a a libpng.so file? I am using UBUNTU 10.04 Kernel 2.6.32 - 22, 64 bit. Thanks (HowTos)