dsp builder

i have EP2C70 dsp development kit cyclone II edition.

i have installed dsp builder v6.0, quartus II v6.0 and nios II v6.0 (all software provided with the kit)

and i am using matlab 7.0 (june 2004)

when i have run the simulation of video up-conversion example referance design (AN:427)

error appear and it show bad link on the video source and video sink.

please help me what should i do