No Nios II target connection paths were located. Check connections and that a Nios II

Erm... I build the system with belowed step:

i) generate a SOPC system with jtag(default setting), nios II with custom instruction, sdram and on-chip memory.

ii) assign pin for my system such as clk and etc

iii)compile and synthesize

iv) go to eclipse browse for my SOPC file and select "hello world" template

v) build the software and run as hardware with my usb plug in(i can see my usb detected from device manager)

error occur during run as hardware and a window is prompt with stated error.

Is my step correct? because i follow the guideline that been found from internet.