Help Motorola MPX220 Java JAR Installation

[Guest deadice]

I have searched many posts on the forums here but cannot find any help so i am posting here.

I have a Motorola MPX220 phone and want to install a Java game on it in JAR extension. I copied to the phone, open file manager but it wont open (cant recognize the format). I have installed CAB files fine before but this will not work. I have tried renaming JAR to CAB but it gives an error about the certificate : "...not digitally signed with a trusted certificate"

I have tried making JAD files and nothing works!

I cant believe I am the only one with this problem, so if someone has a solution, we can sticky this topic.

Thanks.

[Guest deadice]

Just another note, the Java software on the phone does not have an option to install programs and does not have a "midlet manager" or similar that my Sierra VOQ phone had.