You can turn on spring logging to see if that provides any insight.
Go to the logging.properties file in your resources folder and change this line:
log4j.category.org.springframework=ERROR, STDOUT
To this:
log4j.category.org.springframework=DEBUG, STDOUT
This will produce quite a bit of logging, so you may want to clear your console output after the app starts up. Take a look at the log messages during login and again when you try to access one of the pages.
If nothing jumps out at you, send me the log and I will take a look. Or if you would rather and are able, export your project and send it to me and I will try to reproduce the problem.
Thanks,
Jay