For some reason I can not get a customized search button to appear in either the 'search' or 'search_header'.

My site, BrassLinePro.com, is using Zen Cart 1.3.6 with a slightly customized version of the SimpleZen Template. The search button resides at: brasslinepro.com\includes\templates\brasslinepro\buttons\english\button_search.g if

In debugging, I've removed the entire folder brasslinepro.com\includes\templates\brasslinepro\buttons\english\ and the site's buttons all revert to the default (as to be expected). With the folder in place all other SimpleZen buttons seem to appear (minus the seach button).

I verified the 'tpl_search_header.php' code and it seems to be in order.

Any ideas?
Thanks!