[WDA] Suspend & Resume plug

Hi.

I wanna navigate from some WDA app to external Web App.

I made these Web applictions to test this function.

But it is not correctly work.

When the WDA app(Caller) fire suspend plug and then navigate a external Web App, the Session of WDA app is

terminated in SM04 transaction.

I already check my app configuration.

1) SICF the WDA app node's "Session Timeout" property

2) Is there checked anything?

What happened?

What I am going through?

Plz help.