Vendor Master: Field Status madatory donu00B4t work

Hello my friends!!!

I have a problem whit a fields status in vendor master to account group.

I make the field status as mandatory "bank details" to the account group of vendors. This field has several fields within itself.

When I run the t.code MK01, only some fields ask for obligatory and another no. to me. It allows me to happen of screen without completing all the fields.

Why don´t work this check??'

So that it does not work correctly? somebody knows like doing so that it works? Is something this bad one in customizing?

thanks

Regards