X with shadow-passwords

[estoy@ver.megared.net.mx]

Could anybody help me? I can't start an X session as unprivileged 
user.

Using xdm neither unprivileged-user or root can login
Using startx just root can login

I read in the LinuxFAQ that it might be due to use of non-shadow 
password programs (as startx, X, xinit, etc). Since I'm using 
shadow-password "protection" in my system, I think this could be the 
problem.

Does anybody know what version of xfree86 has this shadow-password 
compatibility?
Is there any chance I get my actual version (3.3.6) to work with 
shadow-password compatibility?

I really appreciate any sugestion since I'm a newbie-Debian-user (Is 
this the reason why nobody answer my questions?, this is not the 
newbie mailing list I thought )

Thanks in
advance.

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