Rox,
Try adding just one "sub"-pageframe and place the following code in its Init:
SET STEP ON
IF NOT DODEFAULT()
RETURN .F.
ENDIF
Possibly tracing through the code will give you the answer...
Regards,
Kevin McNeish
Eight-Time .NET MVP
VFP and iOS Author, Speaker & Trainer
Oak Leaf Enterprises, Inc.
Chief Architect, MM Framework
http://www.oakleafsd.com