the success rate of request mastership reached 100%

C#:
private void setTrue_Click(object sender, EventArgs e)
{
	if (controller.OperatingMode == ControllerOperatingMode.Auto)
	{
		UserAuthorizationSystem uas = controller.AuthenticationSystem;
		if (uas.CheckDemandGrant(Grant.ModifyRapidDataValue))
		{
			ABB.Robotics.Controllers.RapidDomain.RapidData rd = controller.Rapid.GetRapidData("T_ROB1", "Server", "connected");
			using (Mastership m = Mastership.Request(controller.Rapid))
			{
				rapidBool.Value = true;
				rd.Value = rapidBool;
			}

		}

	}
}

private void setFalse_Click(object sender, EventArgs e)
{
	...
	rapidBool.Value = false;//As above except true becomes false
	...
}

RAPID:
MODULE Server(SYSMODULE)
!////////////////
!GLOBAL VARIABLES
!////////////////

CONST num WAIT_MAX := 3600;!one hour

VAR bool connected;!//pcsdk connected,pcsdk??????TRUE?????

!////////////////
!////////////////////////
!//SERVER: Main procedure
!////////////////////////
PROC main()
    connected := FALSE;
    
    WHILE TRUE DO
    WaitUntil connected = TRUE \MaxTime:=WAIT_MAX \PollRate :=0.01;
    WaitUntil connected = FALSE \MaxTime:=WAIT_MAX \PollRate :=0.01;
    WaitUntil connected = TRUE \MaxTime:=WAIT_MAX \PollRate :=0.01;
    WaitUntil connected = FALSE \MaxTime:=WAIT_MAX \PollRate :=0.01;
    ENDWHILE
ENDPROC

ENDMODULE