Stuck on "Constructing Data Center Browser"

When I launch the game, my client loader gets stuck at "Constructing Data Center Browser." I then receive the following error message:

System.IO.FileNotFoundExceptio n: File or assembly name System.Web or one of its dependenies, was not found.

File name: "System.Web" at System.Web.Servies.Configurati on.WebServicesConfiguration.ge t_Current()
atSystem.Web.Services.Protocol s.SoapClientType..ctor(Type type)
at System.Web.Services.Protocols. SoapHttpClientProtocol..ctor() at
com.turbine.launcher.Data CenterService.GLSDatacenterInf oServer.ctor()

=== Pre-bind state information ===
LOG: DisplayName = System.Web, Version=1.0.5000.0, Cultue=neutral
PubliKey Token=b03f5f7f11d50a3a
(Fully-specified)
LOG: Appbase = C:\Program Files\Turbine\The Lord of the Rings Online\
LOG: Initial PrivatePath = NULL
Calling assembly : System.Web.Services, Version=1.0.5000.0
Culture=neutral, PublicKey Token =b03f5f7f11d50a3a.
===

LOG: Publisher policy file is not found.
LOG: Host configuration file not found.
LOG: Using machine configuration file from
C:\Windows\Microsoft.NET\Frame work\V1.1.4322\config\machine. config.
LOG: Post-policy reference: System.Web, Version=1.0.5000.0, Culture=neutral, PubliKey Token=b03f5f7f11d50a3a
LOG: Attempting download of new URL file:///:/Program Files/Turbine/The Lord of the Rings Online/System.Web.DLL.
LOG: Attempting download of new URL file:///C:/Program Files/Turbine/The Lord of the Rings Online/System.Web.EXE.LOG: Attempting download of new URL file:///C:/Program files/Turbine/The Lord of the Rings Online/System.Web/System.Web.EXE.

What do I need to do? I have uninstalled/reinstalled at least twice now, including re-downloading the game.