Share Access impossible from Windows computers ...

[Vics88]

Hi guys

I have a problem with the shares of my ReadyNAS PRO 4 4.1.2.22.

When I want to access a share from a Windows 7 post (or other) there is always a message
indicating bad authentication and it asks me again the user and password.
The user I use is owner of the share and the group to which they belong is also owner of the share.

If I connected with the admin account it works!!

Someone would have a solution? Thank you in advance
(sorry for my english :))

Thanks
Vitor