VC ActiveX composite control in CBuilder

Hi All !
I want use some third-party ActiveX control in program written on CBuilder
5.0. This control build on MS VC 6.0 as an ATL composite control (dialog
based). I install it to CBuilder IDE and put it on the form. When I running
test application I see that ALL keyboard messages ignored. Mouse messages
processing OK. This composite control contains standard "Edit" and "Button"
controls. Why this don't work and how solve this problem?