Need old firmware for SONY DVD RW DW-U55A

vbimport

#1

since I have upgraded my SONY DVD RW DW-U55A with firmware 2.5b I’m not able to read some old DVDs burned with firmware 2.5a.
I’d like to restore the old firmware 2.5a on my DVD writer but I can’t find it .
Can sombody send a link to it?