I'm getting the following error when trying to create an organization for the first time. I've checked everything I can think of but to no avail. Anyone seen this before?

Error creating organization. See audit log for more details.

System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Exception: Error executing 'CREATE_ORG' task on 'XXXXXX.com' ORGANIZATION ---> System.Web.Services.Protocols.SoapException: Server did not recognize the value of HTTP Header SOAPAction: http://tempuri.org/SetOUSecurity. at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at SolidCP.Providers.HostedSolution.Organizations.SetOUSecurity(String domain, String organizationId) at SolidCP.EnterpriseServer.OrganizationController.CreateOrganization(Int32 packageId, String organizationId, String organizationName, String domainName) --- End of inner exception stack trace --- at SolidCP.EnterpriseServer.OrganizationController.CreateOrganization(Int32 packageId, String organizationId, String organizationName, String domainName) --- End of inner exception stack trace ---