No output for complex systen generator IP cores

Hello there, I am able to successfully generate IP cores for simple designs using IP integrator and get the output in SDK. But when follow the same procedure for generating IP core for the below model (slightly complicated) and process it using SDK the Outputs

 are only Zeros in SDK. (i use axi-lite interface in system generator) why is that so? Can anyone please through light on this. ? Thanks in advance