Bullets & Numbering

I am trying to set numbering list property to paragraph, it is working also but Numbering style mode is getting set to "Continue from previous number"

Actually I am setting text atrribute kBNNumberStartAtBoss but still it is not working, looks like I am missing something. Can someone help me for this

Following code how I am setting startat number

InterfacePtr<ITextAttrInt32> iTextAttrInt32(CreateObject2<ITextAttrInt32>(kBNNumberStartAtBoss));
ASSERT(iTextAttrInt32);
if(iTextAttrInt32) {
iTextAttrInt32->SetInt32(bullet_record->bullet_number_startat);
this->fParaAttributeBossList->ApplyAttribute(iTextAttrInt32);
}

Thanks in advance

Chetan