The path for the driver would be C:Program FilesJasperSoftYour iReport versionlib I have used jtds-1.1.jar to connect to SQL Server 2000 and 2005 databases and it works for me. Hope this helps! Many Thanks for your answer. I don't understand where to put this damn file because inside the "lib" directory don't work. I then copied the file to EVERY directories and this work :-) The next step is to remove the file from one directory and test, then another directory, etc.