TabbedNotebook's + Windows 3.11 + win32s

A strange error occured...

I have made a program which uses some TabbedNotebook components (from
the windows 3.11 component section). The program is made in Delphi 2,
but i wan't it to run under windows 3.11 aswell.. And everything works,
except that the TabbedNotebooks goes invisible in some way.. They still
work; you can try to hit the correct tab and the page will change, but
you can't see the tabs!!! Why is that?!?!?!?