What code are you using?
You might need to set the focus to the sub form, before running a command to
open a new record
Me.SubFormName.SetFocus
DoCmd.GoToRecord , , acNewRec

Signature
I hope that helped
Good luck
> I have a subform that I am using for Data Entry however instead of adding a
> new record, as my command button states, it writes over the record previously
> entered.
> If I use the subform on it's own it works fine, when this form is in the
> 'master' form it doesn't work.