Excluding Ramdisk from scanning

I have one question.

I have setup Ramdisk using Gavotte Ramdisk. I have assigned ramdisk letter R:.
I have set Sandboxie container on that Ramdisk so all temporary internet files are stored in R:\Sandbox\... location.
I have made exclusion in Nod32 AV (6.0.115.0) for R:\*

When I check up statistic page to see last scanned object there is no entries about R: but there are a lot of scanning going on on \device\HarddiskVolumeRD\Sandbox\...
So although I excluded R:\ from being scanned, all content is still scanned through \device\HarddiskVolumeRD\.

I tried to add \device\HarddiskVolumeRD\* to exclusion list but Nod doesn't accept it. Should I format the exclusion string differently?
I also disabled Anti-Stelth technology but it didn't help either.

So is there a way to disable scanning on RamDisk?

 

Have you tested scanning by putting the eicar test file to R: to see if it's detected there?

 

Yes, Eicer test file got detected during download. Here is an alert picture:

http://imageshack.us/a/img594/6619/picturezi.jpg

 

One more interesting information - although statistics page is showing files on \device\HarddiskVolumeRD\ being scanned, the total scanned objects counter is not changing.