YAMS+PHX help (on Evo) + JOT

when in YAMS readme I read:

6. PHx Setup
------------

If using the PHx snippet then please note the following. For some reason, a file
specified using include_once gets reincluded and this causes the PHxParser class
to be redefined, which generates a PHP parse error. This can avoided by modifying
the PHx snippet to wrap the include in some code that will only include the file
if the class has not yet been defined:

if ( ! class_exists( 'PHxParser' ) )
{
 include_once $modx->config['rb_base_dir'] . "plugins/phx/phx.parser.class.inc.php";
}

Also, please remember that the Plugin Execution Order must be edited to place
YAMS in first place - that is before PHx - on all associated events.

What does it mean exactly? What shall I do? Where?
I found a PHx plug in, but not a PHx snippet.

I'm having a

Fatal error: Cannot redeclare class PHxParser in […]/public_html/assets/plugins/phx/phx.parser.class.inc.php on line 12

in pages that use a template with some self-made multi-language TVs (a paint picture, size, thecnique (multilanguage) and other relevant data), there is JOT (minimal call, ate the moment), but not PHx to my Knowledge.
More precisely, somethimes I get the page coming from the menu, then I get the error switching language.
Thanks for any help [ed. note: andrearicci last edited this post 14 years, 11 months ago.]

The plugin is meant. Open the plugin and add the wrapper if(!class_exists... to the plugin code.

Thank you.
Is this correct?
original PHx:

becames:

Is that ok?
I'm still getting the same error.
EDIT:
The page display as expected once the cache is cleared an i reach it from the menu. Once there, if I switch language I get the errror; if I go back without clearing the cache, I get the error.
Thanks for your help. [ed. note: andrearicci last edited this post 14 years, 11 months ago.]

the problem was the Jot call - removed it and Modx works.
I changed the Jot call as in YAMS How To
YAMS + Jot but still got the error
So, is my problem a conflict between Jot and PHx? How to fix it?.
Thanx [ed. note: andrearicci last edited this post 14 years, 11 months ago.]

Jot and Ditto both have their own phx libraries; they don't need the PHx plugin.