Security Exception

Hello There,

I am getting the below exception while specifying the source control in an action, all previous actions worked fine with the same source control but for one work flow I am getting this.

Kindly help me on this,

**Security Exception**

Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. 

Exception Details: System.Security.SecurityException: Security error.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 


[SecurityException: Security error.]
   Inedo.BuildMaster.Web.Controls.ActionServerPicker.LoadPostData(String postDataKey, NameValueCollection postCollection) +703
   System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +574
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +12573463
   System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +12572973
   System.Web.UI.Page.ProcessRequest() +119
   System.Web.UI.Page.ProcessRequest(HttpContext context) +99
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +913
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +165

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.17929

Product: BuildMaster
Version: 4.7.5

Though the error message isn't very clear, that error means you are not authorized to view the particular server selected for the SCM provider or the action. If you have changed privileges recently, try invalidating the privilege cache on the Admin > Privileges page.