I work in a medical office and use Access to keep track of patient information. My main form is called Patient Info and containts two combo boxes, a name look-up and a chart-number look-up. This form contains detailed patient information. On this form I also have an "Appointment" button which, when clicked, pulls up a subform within a subform that lets me keep track of patients' past appointment dates. Both subforms are displayed on the same form: subform #1 displays basic patient info (name, DOB), and subform #2 is a form in which I can add an unlimited number of patient appointment dates. When I want to enter an appointment date for a particular patient, I first have to look up the patient in the main form, click the appointment button, then enter the appointment into the subform, and close the subform so I'm back to the main form. This gets very tedious as I have to enter appointment dates for many patients at a time. To make things easier, I would like to have a combo box on my subform so that I can enter an appointment date, and then look up another patient from the appointment subform. When I tried this, the combo box worked for only a short time, and eventually stopped displaying the patient information I was trying to look up. Does anyone know why my combo box starts working? (Sorry for the looong explanation! I hope it made sense!)