SQL statement - please help

Dear all Please, I realy need your help. I am trying to extract only those records that were entered during the past hour from my MySQL database. The following SQL statement extracts all the records. As soon as I change the INTERVAL to 1 HOUR I see all the records in my database. When I change CURDATE() to CURTIME() no records are extracted from the database. The cgtimeposted field is a time data type. Please advise me as to how I can formulate my SQL statement so that only those records entered within the past hour displays on my page. Here is my current SQL statement - this statement displays all the records: $sql = "Select tblchatglobal.cgid, tblchatglobal.cgdateposted, tblchatglobal.cgtimeposted, tblchatglobal.uid, tblchatglobal.cgmsg, tblusers.uid, tblusers.uusername from tblchatglobal, tblusers where (tblchatglobal.uid = tblusers.uid) and (DATE_SUB(CURDATE(),INTERVAL 1 HOUR) <= tblchatglobal.cgtimeposted) order by tblchatglobal.cgtimeposted desc"; Jacques