Dependency to other modules of same maven parent project are not resolved.

In STS 2.5 I work on a multi-module maven project with dependent sub modules (a depends b).

"Import Existing maven project" is used for project definition in STS.
For sub modules "Resolve depencies from Workspace projects" option is set.
In "Maven dependencies" library of module/project a, module/project b is added automatically.

But in turn classes of b are not resolved in project a. :mad:
Why?
What is solution?

migration 2 STS 2.6 solved problem. probably due to m2eclipse upper version in STS 2.6 :)