Redhat linux – sendmail user auth by windows 2003 AD

dear sir/madam,
please help to solv me the above problem.
I already done the job but geting a error like
saslauthd [3335] :detach_tty :Cannot start saslauthd
saslauthd [3335] :detach_tty :Another Instance of saslauthd is currently running

From internet I get some sol. to stop the service of saslauthd and restart the sevice but this idea is flop.
Please help me . Thanking in advance.
manab nandi