Fast and Easy Checkout COWOA_HEADING

[Redbilll]

I have installed Fast and Easy Checkout for Zen Cart Version: 1.9.6
Zencart 1.3.9h

I have succesfully installed this Addon, everything works.
I use a different Language, i have succesfully modified these files except the COWOA_HEADING does not change.

I have changed /includes/languages/dutch/MY_TEMPLATE

define('COWOA_HEADING', 'Checkout Without An Account');

with define('COWOA_HEADING', 'Fast Checkout'); It does not change.

the tpl_default login echo's 'COWOA_HEADING'

If i remove all my languages files i get the display of TEXT_RATHER_COWOA - TABLE_HEADING_BILLING_ADDRESS wich is normal .
But the COWOA_HEADING still displays Checkout Without Account?

Thnx inadvance

[Redbilll]

Anyone have the same problem?