SOLVED
Good day guys.
i was trying to RELOCK THE Bootloader so that i can update to JB. im using flash tool 0.9.9.0
but it kept on sayng s1 boot download. i think its a driver or something but i already installed the driver for Xperia P because it is already included in the Flash tool. but still the same problem s1 boot download , telling me that i should look for the driver and then install it. 
its fine, i encountered similar issue last night while relocking bootloader, ensure that PCC is not running when attempting to relock your bootloader!
close all programs, reboot your phone and connect to pc, with debugging off. once flashtool has detected that device is connected with debugging off, go to settings and switch debugging on!
let flashtool recognise again! and then happy flashing!!
if above doesnt work, restart your pc and re-install drivers again and see outcome!
hope all works out! 
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