Gold code generator

Hi,
I'm a newbie in vhdl programming. But I have to make a gold code
generator in a xillinx fpga device.
My problem is that the application note from xillinx does not work
properly at the test bench. If anyone could help me with an other code,
or something else i would appreciate it.
You know i'm desperate right now because i need to finish my university
school with this project and i can't find the problem.

.