Create Workflow for Quotation User Status

Hi Experts !!

Kindly help me to create a workflow that sends outlook mail triggered by Quotation User Status Changes over Business Object BUS2031

I have created a User Status Profile Over

SPRO>Sales And Distribution>Sales>Sales Documents>Define and Assign Status Profile

and then Assigned the User Status Profile over the Sales Order Type  QT

I followed the SCN Doc

Workflow with Status Management

Then i went to SWDD

and Referred to Business Object BUS2031

and Here I can't Find the Parameters that use UserStatus