i didnt account for perl directories other than /usr/bin/perl so if, for instance your server's perl is in /usr/local/bin/perl you will have to open up npa_vbgen.pl and find this line:

and replace it with:

if the server is having problems executing the script, that may be the cause. sorry about the problem, but i didnt intend this to be a public thing when i wrote it to begin with

i might actually fix it up and release a new version, since ive made some improvements (notably linking to forum threads, as a Comments>> link [it works, but its got a few odd bugs i'd like to fix first ])