linux cvs with windows AD logins

Hi

We are trying to setup authentication of CVS against Active Directory.

we have cvs server runs in LINux RHEL 4 -ES

which has  readers ,writer, list  passwd authetication takes form system

but we want to migrated all linux login to singel AD logins:

fot this we have

1) WINDOWS 2003r2 --AD server  and the same system act as DNS SERVER

2) LInux clinet is able authiticae AD logins and get logins   also able to
login in linux but not in cvs

kindly provide me suggestion and any configuration has to modified

Thanks --