How can the client form include the priority field for the client to choose?

I found posts regarding hiding this but the opposite doesnt seem to work.

I set the Setup > Tickets > Options > Client Priority Option to All Clients but the field doesnt show on the client webform.

I also have specific Priorities set for different companies

This is so they can choose the level that relates to their internal SLA's

e.g.

Company A

     Priority 1

     Priority 2

Company B

     Severity 1

     Severity 2

I can't get the Prioruty field to show at all on the client webform

Cheers

Matt