hi pradeep,
i connected nokia 3100 through data cable to the computer,installed nokia pc suite and then copied jar file of my application to the phone.when i tried to open the file on mobile a popup message of invalid file is displayed.my application is using wma1.0 ,cldc1.0,midp1.0, it is running on j2me wirelesstoolkit 1.0.4.
thanks ,keep replying