CPU 416 2XK04-0AB0 FIRMWARE 4.1.0 DOWNLOAD PROBLEM

HI
CPU 416 2XK04-0AB0 FIRMWARE 4.1.0 DOWNLOAD PROBLEM
i have a S7-400 station included PS 407-10A on slots 1,2 , a cpu 416 2XK04-0AB0 on slot 3.i configure this station in hw config.(simaic manager v 5.4 sp4) and i want to download this configure to cpu. i used PC ADAPTER USB and set PC/PG INTERFACE to PC ADAPTER(AUTO) and test the connection in that window with click on STATRT NETWORK DETECTION tab.my mpi network detected with 187.5 kbps and was ok.then i went to download hw config to cpu.download page opened.when i click on VIEW tab on this window in ACCESSIBLE NODES part appear a node with mpi address 2 but cpu specifications not appear.
i think i don't have mpi network problem.my problem is that my cpu not recognize.
is that necessary to update the firmware of cpu?
is that necessary to master reset my cpu?
best regards.