Can you tell me how I can make that my visitors to not have the security code when they add a webside?
we won't let your lack of experience to create a sink from your site.
Please refer to the following thread about security codes: http://forum.ucoz.com/forum/6-13711-1
The second problems is:All of my entries have atribute 'nofolow' I what to change this big problems becouse I want to have visitors.
There is no such problem, there is just your inexperience. "Nofollow" attribute is included only to links which may be added by any visitor of your site (comments, forum posts, etc.). And you must know, that such links may be a SPAM. So uCoz thinks about quality of your site.... Please, don't forget, uCoz has been created, to make your live Easier, but not to add more problems to you.