Did the old BoxCryptor version work with NetDrive?
Can you please create a log file (click Start and start BoxCryptor by executing "BoxCryptor.exe /debug" - the log file will be placed on your Desktop) while you try to open the BoxCryptor drive when the encrypted folder is located on the NetDrive drive? It would help if you send the log file via our Helpdesk.
I wanted to try NetDrive myself, but I could not get it up running. Also a look in their support forums shows many problems. So I must admit, my opinion is not the best of this software and I could image it causing more problems.