DSP Builder to Modelsim II

Hi I have the following a HDL import of the following vhdl file to dsp builder simulink.

Hoewever I didn obtain correct output from the modelsim simulation or I would rather say that most of the outputs display '-' or 'X' and I have tons of following error:

There is an 'U'|'X'|'W'|'Z'|'-' in an arithmetic operand, the result will be 'X'(es).

I followed several suggestion from the net but still to no success. Can anyone help me to take a look at my attached vhdl file and advise me on how to change my coding??