Created Unassigned: I don't know Why r plot is broken. [176]

I want Displaying an R Graph within a C# .NET Winform.
So, I use RGraphHoot code form [here](https://rdotnet.codeplex.com/workitem/7).
But I have some problem.
Plot is broken when display with in panel.
I just call
cbt.install();
engine.Evaluate(@"....")
cbt.Uninstall();


Plz help~