Google Checkout installed, but error message when Edit

[grantli2002]

I am pretty new to OSCommerce. I use the first way installed google checkout (basically copy the files into my admin area). I can see Google Checkout link under my payments module. I can install google checkout as well. When I click EDIT to enter the "merchant ID" and "merchant key", I got the following error:

 

Fatal error: Call to undefined function: tep_cfg_select_multioption() in /home/*****/public_html/admin/modules.php(228) : eval()'d code on line 1

 

Can anyone help me with this? Or if you know the correct link of solving this problem, please direct it to me. Thank you.