Hello

This might be a basic question but I'm stuck and would appreciate any constructive feedback.  A form I've created does not seems to allow entry of new records even though Allow Additions, Allow Deletions and Allow Edits are all set to "yes."

I've created a form (single form, not continuous) based on a query to show data for a particular type of activity (trips).  The query pulls information from 4 tables:
► TRecord   supplies RecordID & RecordDate
► TActivity supplies ActivityID & StartTime and has ReordID as a foreign key
► TTrip     supplies TripDist, TripHr, TripMin and UnitID and has ActivityID as a foreign key
► TUnit     supplies UnitAbbrev and has UnitID as a primary key
FYI: TripHr & TripMin are for trip duration & UnitID is there as some trips are reported in miles and others are Km or meters.  All the primary key fields are autonumbers.

The form has all the fields from the query except the unit abbreviation - that is from a combo box getting values from TUnit and writing the UnitID to the UnitID filed in the query (fwiw, ID fields are "grayed out"). The form will properly display all the data that's already in these table but my problem occurs when I attempt to enter new trip data. I can select a date and enter values into the distance and duration fields but I cannot enter a time into the StartTime field nor can I save the record.

I'm sure that I'm missing something basic, but I'm just failing to see it.
Thanks in advance.