Just for chuckles try this instead of populating variables:
MsgBox Me.lstMultipleValues.Column(1)
MsgBox Me.lstMultipleValues.Value
Can you attach the db here?
this gave me a "Invalid use of Null" error.
Not anytime soon, pretty massive DB with confidential data so i'd need to make a copy and strip it down. probably would be able to post till monday.