Nintex Workflow approval through c# cose

Hi,

 

Execution of following lines of code is going to rejected part of the Nintex work flow . any Idea why it is not approving

context.TaskItem[Nintex.Workflow.Common.NWSharePointObjects.FieldDecision] = 1;

context.TaskItem[SPBuiltInFieldId.WorkflowOutcome] = "Approve";

context.TaskItem[decisionFieldId] = 1;

context.TaskItem[outcomee] = 1;

context.TaskItem[commentsFieldId] = comment;

context.TaskItem[SPBuiltInFieldId.Completed] = true;

context.TaskItem[SPBuiltInFieldId.PercentComplete] = 1;

context.TaskItem[SPBuiltInFieldId.TaskStatus] = SPResource.GetString(new CultureInfo((int)context.Web.Language, false), "WorkflowTaskStatusComplete", new object[0]);

context.TaskItem.Update();