Default settings allows the Build management for leaders and admins only. You can edit MySQL table role to add this possibility to another role or create a new one accrding you needs.
TL 1.7 brings GUI to do it.
The question is part of global question - describe wofkflow of using TestLink.
So, and the question is what the preconditions is for creating Build? Because when I've create the project I cant make Build in next step. I need to do something before.
i guess, if you say "create project", you mean, you have defined product, categories and testcase, right?
the next step is to define a testplan.
that testplan afterwards gets a build and testcases assigned.