[SOLVED]more than one replacement, same template on plugin

[Dr.CustUmz]

im trying to do multiple edits to showthread quickreply. individually these work, but when i do more than one only the first one works.

how can i make more than one change?

$vbulletin->templatecache['showthread_quickreply'] = str_replace($find,$replace,$vbulletin->templatecache['showthread_quickreply']);
$vbulletin->templatecache['showthread_quickreply'] = str_replace($drcrb_hd,$drcrb_hd.fetch_template('drc_iiu_below_txtarea'),$vbulletin->templatecache['showthread_quickreply']);