HP LoadRunner 12.0.2 controller got "IPC connection to browser process is lost" erorr message

When we used TruClient For IE to record my application, this script would be replayed  as well.

But when we move it into controller and run it on each remote host, controller's console would show me message below.

t=00004307ms: Error -205177:  IPC connection to browser process is lost    [MsgId: MERR-205177]

 

My environment:

Controller:

 

Windows 2012 R2

Loadrunner 12.0.2

Windows firewall : domain: off

 

load generator:

 

Window 2008 R2

Windows firewall : domain: off

 

 

Could you tell me how to fix this issue?

 

elvis fan