[horde] registering APIs

[Steve Ivy]

Hello,

I'm trying to implement an API for my horde app, and I'm getting this 
error:

 >"The method "myApp/getPathArrayForTool" is not defined in the Horde 
Registry."

I've got the following in my myApp/lib/api.php

 >$_services['getPathArrayForTool'] = array (
 >    'args' => array('tool_id'),
 >    'type' => 'stringArray',
 >);

 >function _myApp_getPathArrayForTool ($tool_id)
 >{
 > ...
 > return $ary;
 >}

I've looked at a couple other horde apps, but I can't find an example 
of anything else I should be doing to make this work. What am I 
missing?

--Steve Ivy