@FoxMulder2014:
You don't even tell us how you're attempting to install WordPress. I'm going to presume you've clicked on an install link included in DirectAdmin, but if so, that's not a part of DirectAdmin but rather a third-party plugin installed by the server administrator.
If you're a client of a webhosting company using DirectAdmin then you should contact your hosting company support.
If you're the administrator of a DirectAdmin-powered server, then please give us much more information, as zEitEr advises.
At the least how you're attempting to install the package, and how you're running PHP on your server.
Jeff