Problem Updating Maps Server

[geeza@]

Hi, I'm running Plesk 7.5.4 on FreeBSD 5.3.

I've just noticed a problem when I try and change my maps server in the control panel.

Below is a screenshot of what I get

http://img82.imageshack.us/img82/4493/error9fd.gif

Any experts know what the problem is here? I noticed the problem when I added an extra maps server in this way bl.spamcop.net;sbl-xbl.spamhaus.org