Everything is fine with that file. It's never called without arguments, that's why it gives you "Bad Request". When it's called with right query string it's all fine, the javascript is loaded:
http://www.teamflores.com/joomcf/administrator/components/com_apa/admin.scriptload.php?file[0]=extjs/adapter/ext/ext-base.js&file[1]=extjs/ext-all.js&file[2]=extjs/ux/UploadDialog/Ext.ux.UploadDialog.js&file[3]=js/admin.apa.ext.js&gzip=1