Continuum 1.2 build does not build the project when it has change in sub modules

[L. J.]

2008-10-01 16:00:23,317 [pool-1-thread-1] INFO
action#update-working-directory-from-scm  - Updated 1 files.
2008-10-01 16:00:23,473 [pool-1-thread-1] INFO  buildController  - Merging
SCM results
2008-10-01 16:00:23,871 [pool-1-thread-1] INFO
continuumBuildExecutor#maven2  - Changes are only in sub-modules.
2008-10-01 16:00:23,886 [pool-1-thread-1] INFO  buildController  - No
changes in the current project, not building

How do I enable so the project will build when there is change in
sub-modules?

Thanks.

LJ