wok does not take into account modifications done in package file

The situation:

a) There is a package XXX where there are files
XXX.cdl
XXX_Class1.cdl
XXX_Class1.cxx
XXX_Class2.cdl
XXX_Class2.cxx

b)I add new class XXX_Class3 into the section "is" of XXX.cdl .
c)I add two files that contain some implementation of XXX_Class3:
XXX_Class3.cdl
XXX_Class3.cxx

d)Result : wok does not treat XXX_Class3 at all.
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PS

1. If I kill current wok process and then create new one, everything is OK
2. It is not special case if I add to XXX.cdl the declration of some new class.
   Wok does not take into account modifications of "uses" section in XXX.cdl too.