Developer Java

Hi everybody
I need some help again. I developed a simple Hello.java for emulator SDK for Nokia9210 but a recived the folling mesage when i used the AIFBuilder:
"Files cannot be generated-error occurred creating AIF file
Check that aiftool.exe is accessible and that the enviroment variable EpocRoot is defined correctly".
Please somebody help

Try to change UID number to 0x10000000 (for example).

I dont know why this problem occurs, but changing UID number will correct them.