Java in Vodafone 858 Smart

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I've a problem installing Java in my 858:
I follow theses steps:
Open Terminal Emulator
su
mount -o remount,rw /dev/block/mtdblock3 /system
cp /sdcard/jbed.apk /system/app
cp /sdcard/libjbedvm.so /system/lib

but at the last command say me the memory is not enought, so retried but say the file exist and is read only, open the explorer i see the file is some kb versus the 3 mb in sdcard, i tried in terminal change permission with chmod in 777 at this file, tried in adb, tried to eliminate but nothing to do, i've smartlucky rom 2.4 (froyo 2.2.2 rooted).
Some suggestion ?