HELP WITH DH-16W1S Won't Burn!

I have an Acer PC that I bought and was working fine on Vista 32 Bit. Since upgrading to 64Bit version of vista my DVD burner is dead. It will read discs but will no longer burn them. I have searched everywhere for a firmware upgrade but to no prevail. I have tried many different software programs. Does anyone know what might be the issue or where I can get a fix?

The Model is a ATAPI DH16W1S (Liteon)

Firmware model : 2A11

Thanks for any input