You've disabled the Verify option, so we don't know if the disc was burned correctly or not. You could use Beyond Compare, or even HashTab, to compare the source file and file burned on the disc to see if they match (they should). The only other thing I can think of is disabling Unicode support for UDF filesystem (Advanced tab -> Restrictions tab -> UDF tab) but it's unlikely that this is the problem.
By the way, there's newer firmware available for your burner.