Matching Transactions from previous year

My name is Jenny and I started working with Tim recently, the company works with sage 50, I don't have much experience with sage but from what I was reviewing the person who took charge previously either. now I try to use the matching transactions to reconcile my bank, but when I select sage transaction and want to open it for review a message appears saying "There is no data to report" and "you cannot use lookup for the selected sage 50 transaction" What those this mean? How can i look for the transaction and How can I delete That transaction from sage if I can't find it. Thank you for the help.