in reply to invoking perl scripts....

Do you have the shebang line at the top of your script?
What's a shebang line you ask? It's how the shell knows what interpreter to use to run the script. It's a #! followed by the path to perl. #!/usr/bin/perl

Try /usr/interfaces/scripts/ instead.
And that failing then /usr/bin/perl /usr/interfaces/scripts/

Matthew Musgrove
Who says that programmers can't work in the Marketing Department?
Or is that who says that Marketing people can't program?