Can't simulate GTH wrapper generated from scratch

Hi,
I need to use some GTH transceivers of the Virtex-6 FPGA (ML630 eval board) to communicate with a high speed digital-to-analog converter (DAC). I am firstly trying to simulate the wrapper of the GTH transceiver I created, in order to understand the signals assertion flow. However, in simulation the serial pins for transmission are always '1' (both p and n pins).
The wrapper is created using core generator with option "from scratch" to operate in 9.92 Gbps with no line coding. The simulation uses the example design and testbench generated with the wrapper.
However, If I generate the wrapper with a pre-defined template (e.g. 10GBASE-R), the simulation works fine.
Does anybody know how can I solve this problem or some tip the could help me?
Additional information:
- ISE version 14.7
- GTH transceiver wizard version: 1.11
- FPGA: xc6vhx565t-2ff1924 (ML630)
Thanks in advance.

I solved the problem. It seems to be a problem with GTH transceiver wizard, because, even setting in wizard the option "full rate", it generates an example design for "full rate", but init.vhd file is parameterized with "full rate" disabled, and the core never starts.

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