hi Helen im checking the problem of my procedures fails... i had another doubt... exist any way to caching selects? for example im designing a program in delphi 2007 is a basic system with users.. and when any user login i capture the name and i put in a table db_usersconnected when the user logoff i erase the register of the table.. but if the user exit with CTRL+ALT+DEL the program break and i cant erase the register... i thing well i go to create a procedure so this procedure run every 5 min and the function is say to the database.. hey im the user "JOHN SMITH" time "HH:MM" and i go to check the field in the table db_usertime if the time if minor of current_time -5 the user is equal a disconnected and the next step if erase the register... but this method is so unpractical, do u had any idea to i do a practical checking users logon? thx for your time, my appologies for my bad english xD.