mschap - rlm_sql + winbind

Hello, I have set up the rlm_sql module, and it authenticates/authorises users just fine, until it comes to  mschap the thing is, I have mschap pointed to winbind and then to the samba AD domain - so in fails when user is not found in the AD (and SQL users clearly aren't). In the same time I had the experience of using mschap with rlm_sql but without winbind and then it works fine too. So, can I have like BOTH rlm_sql and winbind to authenticate users ? Preferably rlm_sql should come  first. I've read the unlang mschap along with comments, but it's not clear to me how do I do this. Thanks. Eugene.