Opening the options window to a specific sub category

[Ingmar Hendriks]

Dear everybody,

How can i open the options window and set it to the miscellaneous
category with the tab panel that i created within my NB module?

I already found the following code:
OptionsDisplayer.getDefault().open("Advanced");

This allows me to open the options window to the miscellaneous
category but for some reason it doesn't allow me to set it to the sub
category "Advanced/RS232" (my own options panel).

Any help will be appreciated!

With kind regards,

Ingmar Hendriks