It is, which is why I suggest first outputting those maps and testing the maps. If it works you know you have a problem with the plugin settings.
If you do, I would suggest changing the sbs file to output to Vray (GGX) Instead of Corona. Plug that node you have directly into a Base Material Converter, set the output to Vray(GGX) and then try using that as your sbar file. Thats how I would approach it.
edit:
like this:
left node, your material, right node converter to vray ggx, save this and import this into your 3dsmax scene as your sbar plugin. this should fix the errors in the transfer within that node. If it doesnt, then theres something else at play.