I bought the Xperia P Chinese(I'm not Chinese :D) version and I have flashed de Central Europe so I have created the FTF file(thanks to Flashtool) for backup purposes from the SUS and I'm sharing with you
The FTF file is untouched, zero modi...
tttony & merkman did the link provided in the comment above solve your issue?
Now it's working but I have to close adb.exe
What about of the SI number?
My Xperia P came in chinese and its SI number is: 1261 - 3232.6 EN,ZH
That's what in the box says
Just one thing..
This method works also with superuser only (ota rootkeeper is not necessary).
I followed this way:
-flash the old ICS rom posted by lebartman (thanks again)
-root that rom using the old bin4ry tool for rooting ICS (or flashtool,...