Be careful with LIBPATH, likely it installed itself early in LIBPATH, move it to the end.
For VACPP, I use a script instead of letting it mess with config.sys, might be best to do the same.
I'll attach my script to give ideas. You should revert your config.sys to before you installed it and keep the new one under a different name so you know what you need.
Edit: Also note the use of the Toolkit and that some of it is installed by YUM or ANPM