I am getting an error while loading shared libraries libXm.so.3

I have installed a program called Swiss PDB. Upon running the program I get the error: /usr/share/SPDBV/bin/spdbv.Linux: error while loading shared libraries: libXm.so.3: cannot open shared object file: No such file or directory I have used apt-file search libXm.so.3 which gives the output: libxm4: /usr/lib/x86_64-linux-gnu/libXm.so.3 The file itself is a Link to shared library (application/x-sharedlib). With the link target as libXm.so.4.0.4 I'm not sure how to make this program run without getting the error? How do I tell the program where the the shared library is? robert@robert-HP-Compaq-8200-Elite-CMT-PC:~$ file /usr/share/SPDBV/bin/spdbv.Linux /usr/share/SPDBV/bin/spdbv.Linux: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.2.5, stripped robert@robert-HP-Compaq-8200-Elite-CMT-PC:~$ ldd /usr/share/SPDBV/bin/spdbv.Linux linux-gate.so.1 => (0xf77cb000) libX11.so.6 => /usr/lib/i386-linux-gnu/libX11.so.6 (0xf7673000) libXm.so.3 => not found libXp.so.6 => not found libXt.so.6 => /usr/lib/i386-linux-gnu/libXt.so.6 (0xf7616000) libXext.so.6 => /usr/lib/i386-linux-gnu/libXext.so.6 (0xf7603000) libXi.so.6 => /usr/lib/i386-linux-gnu/libXi.so.6 (0xf75f2000) libXmu.so.6 => not found libGL.so.1 => /usr/lib32/nvidia-304/libGL.so.1 (0xf7515000) libGLU.so.1 => /usr/lib/i386-linux-gnu/libGLU.so.1 (0xf74a2000) libpthread.so.0 => /lib/i386-linux-gnu/libpthread.so.0 (0xf7486000) libz.so.1 => /lib/i386-linux-gnu/libz.so.1 (0xf746c000) libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0xf7426000) libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xf7275000) libxcb.so.1 => /usr/lib/i386-linux-gnu/libxcb.so.1 (0xf7253000) libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0xf724e000) libSM.so.6 => /usr/lib/i386-linux-gnu/libSM.so.6 (0xf7245000) libICE.so.6 => /usr/lib/i386-linux-gnu/libICE.so.6 (0xf722b000) libnvidia-tls.so.304.117 => /usr/lib32/nvidia-304/tls/libnvidia-tls.so.304.117 (0xf7226000) libnvidia-glcore.so.304.117 => /usr/lib32/nvidia-304/libnvidia-glcore.so.304.117 (0xf5520000) libstdc++.so.6 => /usr/lib/i386-linux-gnu/libstdc++.so.6 (0xf5437000) libgcc_s.so.1 => /lib/i386-linux-gnu/libgcc_s.so.1 (0xf541a000) /lib/ld-linux.so.2 (0xf77cc000) libXau.so.6 => /usr/lib/i386-linux-gnu/libXau.so.6 (0xf5416000) libXdmcp.so.6 => /usr/lib/i386-linux-gnu/libXdmcp.so.6 (0xf540e000) libuuid.so.1 => /lib/i386-linux-gnu/libuuid.so.1 (0xf5408000)