getsnapshot(null) problem in nokia6600

In java spec it write that when you give imagetype null your mobile phone take snapshot in default imagetype, but forget it!!! when simply you copy paste code and store it via RMS and later try to retrieve it you ll get an exception!.Where did it come? In Netbeans IDE 5.5 you dont get an exception but when you decide to install and execute your .jar program it simply throw an exception even simply wrote a meaningful expression abou what exception is. Try - catch blocks doesnt really do not anything in my nokia66oo and you can't see anything about problem. You will get an exception which see Exception 0 (oh really??)If you have a problem like this i suggest you give up studying and simply give more attention to your girlfriend :)) When you get ready (your mind is free) look at your device specification then you will get the answer.If you don't get anything,write a better code and give up cursing