evening ulif
can I assume you are logging in from xp into the zentyal domain?
can you reboot the xp machine (i've had problems with permissions on xp with a reboot solving it) and try mapping a drive but specify a user with elevated (domain admin) rights on the mapping properties to a zentyal share.
you say the current zentyal version is 3.013, do you know what it was when you started enabling the samba module, I have seen a problem with permissions on a low zentyal 3 version number, even upgrading did not fix it for me.
Would you know how to login as root on the zentyal box and check the permissions on a folder?
you say P: is mapped, but is this the one giving the error- access denied?
regards
jase