TF26201: This work item has unsupported fields, or user does not have permissions

WHen i user Final Builder to edit a specific work item in Team foundation server i am getting the following error:
TF26201: This work item has unsupported fields, or user does not have permissions.

Note:  I do not have any issues when i edit the work item using visual studio Team explorer or using .Net code

###################################
workItem.Open();
workItem.State = "Development";
workItem["Triage"] = "Initiation";

workItem.Save();
###################################


I am not sure it is bug in final builder. Please let know if you have any sugessions.
Thanks in advance

I’m not sure why this is happening, our code does basically the same thing, however we operate on the fields rather than the workitem as that allows more control over type conversions :

Field oField; try { oField = Item.Fields[field]; } catch { throw new EWorkItemException(“Work item does not contain field named '” + field + “’”); } // What we do now depends on the field type: switch (oField.FieldDefinition.FieldType) { case FieldType.String: case FieldType.Html: case FieldType.PlainText: Context.SendLogMessage(“Setting field " + field + " to '” + value + “’”, StatusType.stInformation); oField.Value = value; break;


What we don’t do though is set the workitem.State property… so that may be the cause. Our TFS install is hosed at the moment (due to domain issues), we hope to get it back up and running next week so we will be able to test this then.