Have you ruled out the possibility that the file is damaged?
Test a recovered copy.
Make a brand new file with the same value list set up and test it. (Don't replicate your whole database, just enough features to test this one aspect.)
It's possible there's a problem with the installation of filemaker 11 on your computer, if you have access to another computer, install filemaker 11 on it and use it to test your file. If it works on this other computer, you may need to re-install filemaker on the first computer.
You might delete the preferences file first and see if that fixes the problem as that's easier and quicker to do.