VM - Payment, Authorize.net

[maniee]

Hi:
After installing the Virtuemart, I got two warning messages below by clicking into VM - Payment, Authorize.net.

Warning: require(JPATH_VM_ADMINISTRATOR\helpers\shopfunctions.php) [function.require]: failed to open stream: No such file or directory in D:\AppServ\www\t6-vm1\plugins\vmpayment\authorizenet\elements\authorizenetcreditcards.php on line 25

Fatal error: require() [function.require]: Failed opening required 'JPATH_VM_ADMINISTRATOR\helpers\shopfunctions.php' (include_path='.;C:\php5\pear') in D:\AppServ\www\t6-vm1\plugins\vmpayment\authorizenet\elements\authorizenetcreditcards.php on line 25

Can any expert here tell how to fix these fatal errors.  Thank you for your help in advance!!!