Are they actually running for a while and then suddenly crash, or do they not start at all due to no support for certain APIs and JSRs? If you start a terminal, do the following: /opt/phoneme/bin/runmidlet /path/to/midlet.jar If the application crashes or whatever, have a look at the error on the terminal and post it here. If you see something like, java.lang.NoClassDefFoundError: xxx It means the midlet requires support for certain features that the phoneME build does not have. Davy