MDK4.74 not working with STM32f0-discovery/ST_Link

Hello. Recently, I upgraded the MDK from version 4.53 to Version 4.74. However, when I use the ST_Link which is included in STM32f0-discovery board to debug STM32F100RB, I got the message as following...
MDK4.74 not working with STM32f0-discovery/ST_Link

Hello. Recently, I upgraded the MDK from version 4.53 to Version 4.74. However, when I use the ST_Link which is included in STM32f0-discovery board to debug STM32F100RB, I got the message as following...
unable to load /debug on STM34F4-discovery board

Hello all, We have a trail version of ARM-MDK 4.21 and me ans some friends have been trying to program the it with no success on keil. when using the ST-Link utilities we are able to download the...
unable to load /debug on STM34F4-discovery board

Hello all, We have a trail version of ARM-MDK 4.21 and me ans some friends have been trying to program the it with no success on keil. when using the ST-Link utilities we are able to download the...
Keil STM32F0 MDK debug no good.

I try use Keil MDK debug STM32F051 discovery kit flash example, When I step in "stm32f0xx_flash.c" line 279, the "system viewer" and "watch" show FLASH-> AR different value.