When I try to run DraftSight on my Fedora 15 (64-bit) I get the following error

[mcarter@silver-dragon ~]\\\$ /opt/dassault-systemes/draftsight/bin/DraftSight/opt/dassault-systemes/draftsight/bin/DraftSight.bin: error while loading shared libraries: libGL.so.1: wrong ELF class: ELFCLASS64

Is there a 64-bit version or what's the way to get around this?