LDAP login works via terminal, but doesn't work via GUI

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http://stackoverflow.com – Please if you could give me some advice of what I'm doing wrong you would make me very happy. I've been struggling with this with no luck and I'm kinda desperate. I've got a virtual machine with an LDAP Server installed on Windows Xp. It's Apache Directory Studio. Then I've got another virtual machine with Xubuntu on it. I want it to authenticate to Apache Directory Studio. The two machines can see each other and do ping correctly. Server part (Windows XP with Apache Directory Studio LDAP Server): The server is working great, I did a domain on it dc=mydomain,dc=com with two ou's on it, o (HowTos)