Hi, guys!

Could anyone help???
I have installed Google Checkout (option B) but in my admin I get message:ERROR: module not loaded due to missing language file: /public_html/myshop/includes/languages/english/modules/payment/gcheckout.php
I checked, there is file "googlecheckout.php", when I rename it to "gcheckout.php" or reinstall file "googlecheckout.php" most of my payments modules in Admin disappears (EU Standard Transfer, all Paypal options, Western Union etc). Why? What am I doing wrong???
Is it impossible to have GCh with other options?