I have two Sony Ericsson K610i's. One of them opens .jar(java) files, while the other one doesn't. It just considers it as a random file, not giving me the option to run/install it.
My guess is that there's a problem with Java itself, and not the files. Any suggestions? It's kind of urgent.
Thanks in advance.

The Sony Ericsson that runs the .jar files is with a w660i firmware, by the way. While the other one is the original k610i firmware.