I'm not sure I understand what you are asking accerbs, are you trying to add data from inside the database or through a form?
It kind of sounds like you are inside the Access db, so I am guessing that the error being reported is that the value for the field can not be null or something like that.
In this case, you must just completely fill out the field for that entry or else delete the whole field by right clicking the gray box on the far left and clicking delete.
Otherwise I have no idea what you are asking if that isn't it.