System Workbench for STM32

I use segger j-link v8, I believe programmer is true,because I could programmer stm32vl discovery board with stm32f100rb CPU. But when I try to connect ((http://www.kynix.com/Detail/714728/STM32F030F4P6.html|STM32F030F4P6)) (TSSOP20) ,it fails..

I guess there is problem on VTref pin(pin 1 on jlink), where this pin must connect to? Which pin of stm32?

Also, may I ask you what is that pin that VTref must connect(in the image)??

Thanks in advanced!