Burning with NEC 3500 seems to not working

tried several times to burn movies.

previously was working fine, and with USB 2.0 adapter had
copy/ encode/burn speed reduced from 2.5 hours to 50 minutes or less.
often as little as 30 minutes or less.

something now is amiss.

one message says NEC was “reset”

attached log 2.txt

what have i done?
what can i do?

thanks in advance,

please advise.