Dont know why you are having any trouble, except that it sounds like you are installing from a disk. You should be downloading and installing the game from the official site, as the patcher servers have changed and the old install files point to a non-existant server.
The Camelot Herald should be your first and foremost source of information about DAoC, though ALOT of other sites include information that the Herald omits or has old links for.
http://www.camelotherald.com/news/index.php (click on downloads at the endo of the first information bar on the page)
Here is the link from the above site if you cant seem to find the word 'DOWNLOADS'.
http://www.darkageofcamelot.com/download/
This file includes the EINTIRE game content (all expansions included). Download the full client, install, start patching, play and enjoy.
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Eggi/Sohwyn custom ui download site
BETA
http://www.4shared.com/archive/LllGqvhe/eggisohwyn1110dbeta_1_.html
(:^
I will stop procrastinating tomorrow.
DAoC desktop calender collection
http://db.tt/GnHh5Sc