I am installing zen for desktops on oes2 linux (with all latest patches) from the ZEN7_with_SP1_IR4b_DesktopMgmtLinux.iso media. When I try this I cannot get past the authentication for the tree:

Tree information

Current Tree: XXXXX
Administrative user DN (admin.mycompany): xxxx.usr.xxxxx
Password ():
Validating, Please wait...
WARNING: Unable to authenticate the entered user to the tree.
Please ensure that the user name is a valid DN and that the password was entered

Any suggestions ?