i think i ve solved the problem
as you see at pic 2,there is written track 1 and session 1
when you write the extra files on a multisessioın disc there must be track1 session 2
so alcohol doesnt support this option,producers should read this topic
@vvivek you should read this,i took that from alcohol help files
'Don't close the last session of current disc (optional): Users can decide whether to close the last session of the copied disc or not. To close the last session of the disc means you cannot write any more data to this disc after the recording process is finished. To enable this selection, users can record data next time, if the copied disc still has sufficient capacity. However, we do not suggest enabling this function, as some CD/DVD reader cannot read multi-session discs properly.
'you should try it in different cd-dvd rom/writer'