Saving edited record

I have creaeted one application in Ms. Access and Vb. In this application I have used ADO. I have created one form say "Client" in that I have given one button, when user clicks on it the another form appears wherein users can see all the client name and their bried detail when they click on select button that record appears on main form. Now I am trying to edit this particular record but when I save this record the modified data gets updated in first line of backend ( means if there are 10 records and I am updating record number 5 then the updated results are found in record number 1 ) I am not much professional, I am an intermediate user of VB. If any one of you can help me out I will be very thankful."

Thanks