Hi, All: I met a problem during using SQL Server. There is a real-time application which will accept data from a kind of monitor device and write them into database. The device samples a serial of measuring values(such as electric current, voltage) per minute which are called "history sampling data" and sends them to the application.When the application receives the data, it will write them into database.So every minute the application will execute a writing operation to database. The running envionment of the application is described as following: WinNT4.0Server(sp6), SQLServer7.0, VC++6.0, ODBC API. Now the problem is after a period of regular running(about 1 month), I find the application cant write sampling data into database any more. And trace&debug tool shows one message "Timeout Expired". I exit my application but it does not work. I must restart OS it will restore writing data to database.Because it is a kind of real-time monitoring application users cant permit OS to restart after a period of running. So what can I do? thanks a lot!