OpenLDAP, MS AD and SASLauthd

hi all, i configured two systems for OpenLDAP authentication with MS AD, I have used SASLauthd between them. one is on debian and another one is on centos. But I am getting a strange problem. If I change my user password on MS AD then OpenLDAP on debian can authenticate the old passwd and the new passwd, after 1 hr the old passwd does npt get valid. and on centos Openldap can recognize the new passwd of MS AD if I change the user passwd twice at a time then the old passwd does not get valid.

Anyone have got this problem? Any solution? Please help.

Thanks Oshim