Tracking an Object Using Correlation

Hello,everyone: I build and run the 'Tracking an Object Using Correlation' model in simulink.It wroks well.Then I changed the model( video in and out parts) so that it can generate code and run on DM642dsp. The code runs on DSP,the video in ,but there is no output. I don't know why ? I need help. Thanks a lot. PS: I don't know how to add models here. So if anyone needs the models,you can leave your email address here and I'll send them to you.