error while loading shared libraries

\\\$export LD_LIBRARY_PATH=/opt/dassault-systemes/draftsight/lib/lib; /opt/dassault-systemes/draftsight/bin/DraftSight.bin

/opt/dassault-systemes/draftsight/bin/DraftSight.bin: error while loading shared libraries: libFXExport.so.1: cannot open shared object file: No such file or directory

why????

\\\$uname -a

Linux hp.home 2.6.40.4-5.fc15.x86_64 #1 SMP Tue Aug 30 14:38:32 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux