After installed gwt-linux-1.4.59 and run the code in "GWT in action". got error message like "Can't load IA 32-bit .so on a IA 32-bit platform) "

found the solution:

what i done:
under opt/gwt-linux-1.4.59, where i instlled my gwt, run command
find . -name '*.so' -exec chmod 755 {} \;
find . -type d -exec chmod 755 {} \;

after this i can run my code as mormal user rather than sudo.