what does this error code mean

[nina007 0]

Warning: require_once(PEAR/PEAR.php) [function.require-once]: failed to open stream: No such file or directory in /hermes/waloraweb096/b1814/moo.skullshavercom/skullshaver/checkout_by_amazon/checkout_by_amazon_includes.phpon line 50

 

Fatal error: require_once() [function.require]: Failed opening required 'PEAR/PEAR.php' (include_path='.:skullshaver:skullshavercheckout_by_amazon:skullshavercheckout_by_amazon/library/PHP_Compat-1.6.0a1:skullshavercheckout_by_amazon/library/SOAP-0.12.0:skullshavercheckout_by_amazon/library/PEAR-1.7.2:skullshavercheckout_by_amazon/library/PEAR-1.7.2/PEAR:skullshavercheckout_by_amazon/library/HTTP-1.4.3:skullshavercheckout_by_amazon/library/Mail_Mime-1.5.2:skullshavercheckout_by_amazon/library/Mail_mimeDecode-1.5.0:skullshavercheckout_by_amazon/library/Net_Socket-1.0.9:skullshavercheckout_by_amazon/library/Net_URL-1.0.15:skullshavercheckout_by_amazon/library/XML_Parser-1.3.1:skullshavercheckout_by_amazon/library/XML_Serializer-0.19.0:skullshavercheckout_by_amazon/library/XML_Util-1.2.1:skullshavercheckout_by_amazon/library:.:/usr/local/lib/php-5.2.17/lib/php') in /hermes/waloraweb096/b1814/moo.skullshavercom/skullshaver/checkout_by_amazon/checkout_by_amazon_includes.phpon line 50

[♥toyicebear 206]

Means that the file "PEAR.php" is missing or not in the specified location.

 

You should check with your hosting if Pear is installed and if not if they will do so for you.