I'm sure that Paul's guess is correct; the Data Entry Property of the Subform is bound to be set to Yes if the record count always displays as 'record 1 of 1.'
Change this setting from 'Yes' to 'No.' Common sense would dictate that having a Property named Data Entry would have to be set to 'Yes,' in order to enter data, but this is, of course, MS Access! Having Data Entry set to 'Yes,' means that only New Records can be entered; any existing Records cannot be viewed or edited.
Set to 'No,' data entry can still be done! New Records can be added, and existing Records can viewed and edited.
Linq ;0)>