Cannot access computer in RWW

When I log into RWW as the users I can see the Computer, however when I click connect nothing happens.

The event log on the server shows the following:

Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 24/05/2013 12:32:40 PM
Event time (UTC): 24/05/2013 2:32:40 AM
Event ID: e3d8f0bd5ad74461a6744ca38dffbbf9
Event sequence: 6
Event occurrence: 1
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/1/ROOT/Remote-1-130138363254793914
    Trust level: Full
    Application Virtual Path: /Remote
    Application Path: C:\Program Files\Windows Small Business Server\Bin\WebApp\RemoteAccess\
    Machine name: XXXXX
 
Process information:
    Process ID: 13696
    Process name: w3wp.exe
    Account name: NT AUTHORITY\NETWORK SERVICE
 
Exception information:
    Exception type: TypeLoadException
    Exception message: Could not load type 'System.ServiceModel.Activation.HttpHandler' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, Boolean loadTypeFromPartialName, ObjectHandleOnStack type)
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName)
   at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Configuration.HandlerFactoryCache.GetTypeWithAssert(String type)
   at System.Web.Configuration.HandlerFactoryCache.GetHandlerType(String type)
   at System.Web.Configuration.HandlerFactoryCache..ctor(String type)
   at System.Web.HttpApplication.GetFactory(String type)
   at System.Web.HttpApplication.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

 
 
Request information:
    Request URL: https://remote.xxxxxxxx.com:443/Remote/BuiltIns/HomePage/GadgetDnD/GadgetDnDService.svc/js
    Request path: /Remote/BuiltIns/HomePage/GadgetDnD/GadgetDnDService.svc/js
    User host address: 111.111.111.111 
    User: XXX\XXX
    Is authenticated: True
    Authentication Type: Forms
    Thread account name: NT AUTHORITY\NETWORK SERVICE
 
Thread information:
    Thread ID: 9
    Thread account name: NT AUTHORITY\NETWORK SERVICE
    Is impersonating: False
    Stack trace:    at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, Boolean loadTypeFromPartialName, ObjectHandleOnStack type)
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName)
   at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Configuration.HandlerFactoryCache.GetTypeWithAssert(String type)
   at System.Web.Configuration.HandlerFactoryCache.GetHandlerType(String type)
   at System.Web.Configuration.HandlerFactoryCache..ctor(String type)
   at System.Web.HttpApplication.GetFactory(String type)
   at System.Web.HttpApplication.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
 
 
Custom event details:

Any ideas would be greatly appreciated.