The 'LinksControl' in a work item can't refresh automatically

Hi, I'm developing custom control for my custom process template in TFS2012. 

I found when I add some workitems using 'LinksControl' in workitem A, they can't be shown immadiately in the link lis of workitem A. After refreshing, the added workitem will be in links control. The same control in CMMI template can refresh and show the newest linked workitems automatically.

The added work item is saved in my custom control. I think this is the matter.

My question is :

How can I show the linked workitems automatically in 'LinksControl' although I save them in program?

Any help is appreciative.