I ve made a mistake...i wrote on the first page of the tag and now the reading returns error 196. Also using brickv says tag found but i can't write tag. Is there a way to reset the tag or it s just dead?

That depends on the specific tag that you are using. There are tags that have a read-only flag and if you set it the tag is not writeable anymore.

Thanks i managed to reset it with an android app...