e52 backup problem.........mxkey plz help
 

i got a nokia e52 from a customer to flash. because it work too slow.so i try to backup it's rpl befor flash. but every time it gives me this error:

http://i55.tinypic.com/30c67gm.jpg

customloader not available for this id!

flash imei:000000000000000

why abow error comes ?