How do I get a script to automatically load every time I start Maya. I have placed the script file in every Maya script folder I can find and sourced it from each, then I shut down Maya and restart. Never works. I always have to source it manually. Then it works.

Any help would be appreciated

try to rename the script file with the main proc name like myProc.mel
I had this problem before and I solved it this way, hope it will work for you