I believe that if you are signing the MIDlet from the WTK and installing on the device then it will not work. The keys generated by the WTK are only for testing on the emulator.
To deploy a signed MIDlet on the device you need the key generated by some one like Versign or Thawte.
Iam in the same stage right now so please feel free to correct me if iam wrong.
Can anyone provide me some info on the process that is involved in getting a certificate. I have finished testing my MIDlet suite ( in the untrusted domain)... My midlet accesses the VideoControl.getSnapShot() method and its very annoying to have a popup every time.
Iam looking at how to get my MIDlet signed but if anyone could send me a few pointers .. it would be very helpful
Everything that can go wrong will go wrong -Murphy