"cannot stop processor" , how can I do?

I use STM32F469NI Discovery board. I've convert ST-LINK to J-link and use with Eclipse for number of times. 

When in Crossworks in Targets windows I double click SEGGER J-link , Output windows say

- Connecting "SEGGER J-link" completed

- Cannot stop processor completed

I must go to Eclipse and erase flash then come back Crossworks then I can connect. Or somehow when I push reset button good timing I can connect J-link in Crossworks. And can run/debug.

I can connect no problem in Eclipse. 

 I've try reduce speed from 4000khz to 2000,1000,500,100,50. So far still have problem. 

How to solve this? 

Thank