Diamond Data 1640A-032 Flash Prob

I have a Diamond Data 1640A-032 and when I bought it a couple of years ago I flashed it with the Pioneer 114f Firmware. I was reading this site http://pioneerdvd.rpc1.org/#MITSU which said to Flash my drive with the Pionner 115 V1.33 but when I try to do this I get a error saying firmware mismatch and I was wondering is there any way to flash this drive using another program such as DVRFlash

Thanks in Advance