samsung u600 flash problem

Selected model: U600
Selected com port: COM5
Selected speed port: 460800
Decode *.s3 file - please wait
segments 9
segment 1 20020000 56724 byte
segment 2 20042000 1392304 byte
segment 3 20010000 18372 byte
segment 4 21F10000 21706 byte
segment 5 20040000 1252 byte
segment 6 20000000 8 byte
segment 7 201B0000 25750844 byte
segment 8 21BB0000 3436012 byte
segment 9 28000000 24422596 byte
Phone must be OFF with battery
Please, connect phone and press shortly power button
Syncing phone... OK
Sending loader 1... OK
Syncing phone... OK
Sending loader 2... OK
Syncing phone... OK
Syncing phone... OK
Flash ID: EC000000FD22
bad ask - +ok!
Send loaders - fail
Elapsed time: 71 second, sw ver: 3.5.0040

please help me