I did exactly the same, but the module is still not bending.
I increased the curve steps, and i tried on other splines as well, but nothing.
However, I have tried now, to split the module in 2 parts, and combine them, and it works much better.
Basically now i have "module A" , a copy of "module A" which the railclone mirror tool attached, (as you can see from the screenshot).
In case that i would like to try to subdivide this 2 module in other 2 submodels, how can i tell to Railclone to arrange them with this sequence?a-b-c-d-a-b-c-d-a-b-c-d- etc etc?