This session gives the follow message:
2010-01-28[09:18:18]:E:vna: Log_mesg: Error 107 (Record is locked) on <unknwn> (No retry point specified)
2010-01-28[09:18:18]:E:vna: ******* E N D of Error message

What am I doing wrong? Thank's.

Maybe you are trying to update the selected record with an independent query(not the standard one, inner the session script)

Please post your code for more details