OpenEuphoria

Let's start from scratch: how would I make it so exu can be run from anywhere? Here's what I've tried:

I have /home/realesta/euphoria/bin in $PATH, so shouldn't that make exu accessible from anywhere?

My program index.esp has as its first line:

   !#exu 

Now, I can run exu from the same dir as index.esp and it works fine (I get the 'file name to execute' prompt). But when I try to run index.esp (with ./index.esp), it says it can't find exu!

   -bash: ./index.esp: exu: bad interpreter: No such file or directory 

But exu exists in the $PATH... doesn't it?!

Could it be that it is running ./index.esp as a different user? I don't see how since I'm the one calling it.