newbie question: problem with libpng2

[Sunil Pandey <whatzzizname@yahoo.com>]

I am trying to install libpng2 1.0.5-1 on my machine.
However when I do:
dpkg --install libpng2_1.0.5-1.deb
it tells me that libpng2 depends on libz1 and that
libz1 is not installed. However, according to the
debian site, libpng2 depends on zlib1g which I have
already installed on my system.
How do I get thru this..

Sunil

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