Hi all, I am new to paypal and I am maintaining a site which somebody else had already integrated Paypal with encryped settings "Buy now" buttion. The issue was, the certificate has expired and I generated new one by following the guidelines The following files/certificates are generated my-prvkey.pem , my-pubcert.pem and downloaded paypal_cert_pem.txt But now the issue is, these files (my-prvkey.pem & my-pubcert.pem ) cannot be opened. The PHP function return exactly the error Warning: file_get_contents(/var/www/kaiser/typo3custom/resources/my-pubcert.pem) [function.file-get-contents]: failed to open stream: No such file or directory in /var/www/kaiser/typo3custom/common.php on line 1637 Warning: openssl_x509_read() [function.openssl-x509-read]: supplied parameter cannot be coerced into an X509 certificate! in /var/www/kaiser/typo3custom/common.php on line 1637 Warning: file_get_contents(/var/www/kaiser/typo3custom/resources/my-privkey.pem) [function.file-get-contents]: failed to open stream: No such file or directory in /var/www/kaiser/typo3custom/common.php on line 1638 I have made sure that the files are there with necessary permissions ! I am stuck here, please help me, Thanks in advance , Subeesh