Hi,I have upgraded the firmware of my 48125S to the version S07, but now I have a problem:softwares like nero or clone tell me the my 48125S have a maximum write speed of 32X!!!! Why what's the reason? Anyone can help me to understand the situation.....thanks!!

That would be because you are using 32x media or at least that the last media you used was 32x. Nero shows whatever the max speed that smart burn will allow, not the actual max speed of the drive.

You can check what speed the drive rates media at using the lite-on smartburn util.