Execution plan is showing missing index even index presents

Hi,

 I'm using SQL Server 2012 . I execute the query with actual execution plan and it showed a missing index details . I have added index like this ..

CREATE NONCLUSTERED INDEX [Index_TaskMaster_2]
ON [dbo].[t_TaskMaster] ([refid],[Status])

I run the above script  and then I run my stored procedure. But It is showing again missing index details.

It continues to tell me that t_TaskMaster really needs an index on [Status] and [refid], but that index already exists! I've even dropped and re-created it a couple times to no avail.

More specifics:

So I could not solve the performance issue. Please help me do solve this.

Thank you.