سلام

شما برای مامبو باید از نسخه CB 1.2 استفاده کنید

با توجه به note زیر و عمل به اون نسخه 1.2 را روی مامبو 4.6.5 بدون مشکل نصب کردم :
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NOTE: Mambo 4.6.0 - 4.6.5 don't handle multiple xml files properly,
so you need to first unzip com_comprofiler.zip, remove the file ending
with j.xml and re-zip before installing on these Mambo versions.
For each module used below, you need to unzip the package, replace
the XML file which is inside the "files" folder by the one which is
outside that folder, and then rezip the "files" folder for Mambo 4.6.

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نکته بالا را در نظر بگیرید.
و بعد طبق روند زیر نصب کنید :
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1) Install com_comprofiler component
2) Install mod_cblogin module
3) Install mod_comprofilerModerator module
4) Install mod_comprofilerOnline module
5) Enable CB Login, CB Workflows and CB Online modules
6) Select Name Style parameter from Community Builder Configuration and Save.
Run Community Builder Synchronize Users tool.
7) Disable Joomla/Mambo login modules
8) Add new Public menu item to Community Builder component
9) Add new User List menu item
10) Run Load Sample Data tool (optional)
11) Adjust Community Builder and Joomla/Mambo CMS settings to allow registrations
only through Community Builder
12) Done!
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یا علی