Ok. Your Form and Sub Form Should be linked by Child -Master relation.
In Properties: Data, click the subform and you have to join both forms by a specific field which should be of same type.
So, If you enter data in the main form, the child form (Sub Form) will allow to add data.
Try it , and if not working just mail me.
Remember, if the Subform is having a Primary Key in relation, it'll not accept than one record.
Regards.
[This message has been edited by Haytham (edited 01-27-2002).]