How to use Mosaic

[a]

I copy Mosaic 2.6 from NCSA to my Debian 1.2 /usr/bin but can't run it. 
Although I put a copy of libXt.so.6 in /usr/lib, Mosaic
says:

/usr/bin/Mosaic-linux-2_6: can't load library '/usr/lib/libXt.so.6'
        Unknown error
/usr/bin/Mosaic-linux-2_6: can't load library '/lib/libXt.so.6'
        Unknown error
/usr/bin/Mosaic-linux-2_6: can't find library 'libXt.so.6'

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