"Install Web Application" icon disappears

[ukc]

Hi,

I look after 10 Plesk 9.x servers and this problem has got me stumped!

Two of the servers only allow clients to install one web application after which the "Install Web Application" icon is no longer visible, simply the installed web application is listed and clients cannot install a 2nd web application.

Management links for the installed web application work perfectly. If you delete the web application the "Install Web Application" icon comes back!

Remember, I am not talking about Java Applications which can be limited in the "Resources" section, I am referring to general web applications such as Wordpress, Joomla etc.

What can cause this icon to disappear?

All servers are running Plesk 9.5.4 Linux.

Please help!

Colin.