hi, thank for reply. For your info.I'm not really the java programmer. The situation goes like this. - i compile the report using ireport 1.2.5 (jasperreport 1.2.5) at my pc.My report works well but when i tranfer to the server, and compile it. report cannot work. So i guest the compiler at server (my prevous compiler is jasper 0.6.6) cannot support my new report(1.2.5). I dont now how to change my compiler at server. Before this i try to update jasperreports1.2.5.jar file to /lib directory but problem still same. I hope you can really help me. TQ