ERROR: PleskFatalException

[computernerd]

When I tried to add sbl-xbl.spamhaus.org to the MAPS zone I get the following message below. I have Plesk Linux 8.1. What can I do to fix this bug?

ERROR: PleskFatalException

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Unable to update superserver configuration file: MailMng->setMapsProtection() failed: mailmng failed: mailmng: popen_exec: command failed code: 1 , 
ERROR while trying to check the hostname
Check the error reason(see log file: /tmp/psa-rblmng-script___reconfiguration.log), fix and try again

0: /usr/local/psa/admin/plib/cmd_rbl.php:46
rbl_configure(string 'true', string 'sbl-xbl.spamhaus.org')
1: /usr/local/psa/admin/htdocs/server/mail.php3:150

 

[computernerd]

Can anybody help me on this problem? I am getting a lot of spam daily due to MAPS is not working. Help