Can't Unlock Records In SQL Server

I have an Access97 front end using ODBC to communicate with an
SQLServer 7.0 back end on a different machine. Most of the work I do
in the front end uses forms bound to linked tables that reside on the
back end. In one instance though I have to create some new records
programmatically and I use code in a procedure in a general module in
the front end that looks like this:

Set newrec = db.OpenRecordset("SELECT * FROM [workshop assignments]",
dbOpenDynaset, dbAppendOnly + dbSeeChanges)
newrec.AddNew ' assign the workshop
newrec![ComboWS] = WSKey
newrec![Participant] = IndividualID
newrec![Assigned] = True
newrec.Update
newrec.Close

The problem occurs later when I am in a form that views those records
that were just added. For some reason SQLServer still has those
records locked, and I am not allowed to make any changes to them. I
can't even just delete them. In fact, even when I exit out of all my
forms, go straight into the table window, straight to the table itself
(but still in the front end), I cannot delete or change those records
directly. I've tried taking down the front end and bringing it back
up. I've tried restarting the whole computer where the front end
resides. I've also tried restarting the SQL Server. I still can't
change those records. Oddly enough, I can change the records within
SQL Server itself. The Access97 front end will see the new values, but
still is unable to do anything with them. How can I fix this problem?
Thank you for any help you can give me,
Rebecca Jaxon