open xterm
type in the name of your executable, followed by enter
it should crash with the unresolved symbol error
then, typy
LD_LIBRARY_PATH=/opt/qtm12/lib yourexecutable
and see if it works
the LD_LIBRARY_PATH bit sets an environment variable that tells the system to look in the given directory for libraries, aswell as the standard ones.

I think it just isnt looking in the right place atm.