Restoring Firmware

Hello peeps. Just a quick question. I have an Optiarc AD-7201S Writer. It came with firmware version 1.05. I then updated it to the official 1.06 as i was having problems with it. After doing that, i was still having problems, so i tried using Leggydee’s driver, and still the problem remained. So i’ve just got off the phone to the company i bought it from. They want to test it to see if it needs replacing. Is it possible just to install the 1.06 or 1.05 driver? Cause i think if they see that i have fiddled with the firmware, they might decide not to replace it.
Thanks in advance

Firmware is not driver.
Use binflash and flash back.