Hi all sorry for keeping this question in this forum,i am working with philips MFRD560 smart vard r/w module and stuck with following queries, 1)Command Sequence working succesfully to read data of block 0.but when same seqeuence is given to read next block from same sector,result fails. command sequence given to module to read " block 0 " as folows: request-->anticollision--> select--> authenticate --> read(block 0) --------- (block data read successfully) command sequence read " block 1 " request--> (no further commands given,since unsuccesful reply for this command) load key command was not given before giving above command sequence to module. 2)Once block in a particular sector is succesfully read,can we directly read next block of same sector without giving above sequence of commands except read ? 3)how load key command sequence is to be formed,can u give me example or command string for same ? 4)should i give halt or reset command after every sequence of commands send ? 5)at power on reset module gets initialised with default setting even then is it neccessary to give init_module command ? 6)does any body have command sequence written in Keil C to read/write with this module ? Arjun