Combo Box not allowing selection

[libraccess]

I have been going around this for hours
I have a logon where a staff selects their name it moves to the 2nd cbo (cascades to a region) that they oversee
but I cannot get anything other than the 1st selection to show after update
tried all the suggestions I can find (enabled, the query runs OK, locked = no, a new cbo a new form)
I need a strong coffeeeee

attached are the bare bones
if any one can see anything I cannot i will be very grateful

[June7]

Why is the PK in tblRegion called UserID? Wouldn't RegionID be better? Why is the Region combobox named cboUser and label is User? Why is region data field named strUser instead of strRegion?

Change cboUser RowSource to:
SELECT tblRegion.UserID, tblRegion.strUser FROM tblRegion WHERE RegionCascadeFK=[StaffName];

If you want to reference query object instead, must order the fields as shown or set the BoundColumn property to the column with UserID field.

[libraccess]

Solved
yes I know I should have built the the log on form from the ground up, it was a form with just user and password and I a made so many mods along the way it ended up the way it is.

Any way I see the error now I had with the bound column.
I will now go through and rename to make it more logical to understand
Thanks again for your help