Hi,
I've been trying to copy a flash from one switch to another, by copy from tftp and xmodem also. But i'm unable to

Using xmodem i'm having error massage invalid argument
for the other way i've tried i'm having no such device.
I'm tried to set ip to the swith and connect a network cable but still not able to copy.
When i've connect the cable no light from the port on the switch or my computer
I'm trying this on a cisco switch catalyst 2960G series
Actually i manage to backup a flash from another same model of switch through ftp. Its this image i'm trying to transfer back to the one without flash.