VISA Functions not defined, yet they are?

Hi all,
I have some code that was written for ChIDE on a 32-bit system. The laptop that has the code working is quite old and slow, so I am trying to upgrade it to a newer 64-bit system. However, when I try to run the code it is saying that all of the VISA functions are not defined, as follows.

I have triple checked that I have the correct paths (including the IVI Foundation VISA files) in the config file, as seen here. This is how the config file for the 32-bit system (with changes to the Win64 folder within the IVI Foundation folder) looks so I am unsure about where I am going wrong.
If anyone is able to help me to get this up and running I would be forever grateful.

Thank you in advance.