Thread Not working.

Question

Dear friends I have a following problem. Please help. We have a desktop application which simply reads data from xl file and insert it in database. This data insertion is implemented in one method and the address of this method is given to one thread. Then therad is started to call this method. Up to this it is working fine. The problem is when we run application first time it properly inserts data in database. But when i try to run it again, it does not insert data. It says thread is already running. Actually this application sends a request to remote server and run the script which inserts data into database. This is working for our local server. i.e. when we treat our local server as remote one it properly inserts data. But when we try it with remote one first time it inserts and after that does not work. Please help..