I have instaled serbina language oft CD and i got errors on almost every page:
Errors like:
Notice: Use of undefined constant _UE_YEARS - assumed '_UE_YEARS' in C:\WAMP\www\tribe\components\com_comprofiler\plugin\user\plug_cbcore\cb.core.php on line 1342

Notice: Use of undefined constant _UE_MONTHS - assumed '_UE_MONTHS' in C:\WAMP\www\tribe\components\com_comprofiler\plugin\user\plug_cbcore\cb.core.php on line 1342

Joomla Version 1.5.14
CB version 1.2.1
Downloaded plugin from joomlapolis.

Anyone can help?

The Serbian plugins are verified and working on a setup like yours (see e.g. the site in the signature).

Make sure you are using the latest Cyrillic "serbian" CB language plugin [1] with the official sr-RS Joomla language pack, or the latest Latin "serbian_lat" CB language plugin [2] with the official sr-YU Joomla language pack. The other way around does not work.

Other than that, could be something with your WAMP setup, which I can't help with unfortunately.

[1] www.joomlapolis.com/component/option,com_mtree/task,viewlink/link_id,344/Itemid,55/
[2] www.joomlapolis.com/component/option,com_mtree/task,viewlink/link_id,345/Itemid,55/