Problem with Dopod 838pro

[koey]

I have tried to load my jar and jad application to different brand of mobiles, it works in all kinds of Nokia, Motorola phones and Atom Life O2. However, I encounter a problem when loading it to Dopod 838pro. The error msg is "the jar file format is incorrect", do any of you encounter the same problem? I have also tried to find the spec of this phone, but unluckily, I have little information abt this phone, I just know that it supports Java with MIDP 2.0 and nth else, do anyone got a more detail specification of this phone, Thanks!