BD-C6900 need to downgrade? problem with abode 1022 FW

[hdtvmaster]

hello ;

I have upgraded my SAMSUNG BD-C6900 to 1022.0 and cant read BD-R DL correctly!
today released 1024.1 and no chance to correct it. My BD-C6900 is useless
because doesn't read BD-R DL with above 1022 Fw s.
Full stiry is: First time I returned it
because I though it was broken down ( with reading BD-R DLs) to guarantee ( SAM SERVICE)
they can't recognize and they changed the main board of player . It returned to 1013.0 and worked
well. I have foolish job and I upgraded again to 1022.0 . I was not sure it failure is
because of Fw. because I thiught it was hardware related.
Now unit is useless. I could find 1011 and 1021 Fws but need method to
downgrade. Is there any method to downgrade please provide me.
Sumsung support can't help.
If general idea about the problem ( weak BD-R DL laser ) after firmware 1022?? please comment

thanks