I solved the problem. To do this, I have performed the following steps to be able to match the Bkool roller:
1-. I have uninstalled the program Bsim.
2- I have manually cleaned the windows registry of all references to the simulator program.
3- I have downloaded again the Bkool simulator, configured and matched the roller. (Before it was shown as Ant +, now shown as ANT FE-C).
4- We left the simulator and opened Golden Cheetah. We look again ANT FE-C devices and finally it is paired.
In training mode changes the hardness of the roller depending on the slope as expected.
Using: Windows 7, Bsim2, Bkool roller firm 1.60 and Golden Cheetah 3.4