Hello, I use GameTracker long time, but for some time I am unable to delete my old servers that no longer exist and I can not add my new servers, I said that I did not firewalll and whatever the game, I can not remove them from my bookmarks or add a new (TS3, BFBC2 etc.)

In advance, thank you for your help

First, have you claimed the old servers? If they are offline permanently, you will be unable to do so. The delete feature is only available to server owners. You can remove them from your favorites from http://www.gametracker.com/servers/

If the old servers are dead, you will not be able to re-add them. Servers need to be online in order to be added.