Hi. My root server hoster gives this system settings: CentOS 6 (PHP 5.3.2, MySQL 5.1, Apache 2.2) with Plesk 10 He said I can upgrade in Plesk 10 to Plesk 11. Thats fine. But I need PHP 5.4.x and MySQL 5.5.x for my projects. CentOS have this. Source: http://dl.iuscommunity.org/pub/ius/stable/Redhat/6/SRPMS/repoview/ Can I just update CentOS 6 to PHP 5.4.10 and MySQL 5.5.29 and Plesk 11 working fine with this? I have not worked with Plesk yet, so I have to ask the question. --------------- I need graphviz in my system (http://www.graphviz.org). Is here a problem with Plesk and: yum install 'graphviz*' ?