Slow domain creation on same web space and doc root, authentication error

[TécnicoW]

We have more than 10 domains on the same webspace, sharing the same document root.
When we try to add a new domain on the same web space (sharing the same document root) Plesk takes a long time to create it (about 10 minutes). While domain creation, all the other domains sharing the same document root and web space get an authentication error. When Plesk finishes, all domains work again.
Please, someone can help us? We have no idea how to solve it.

 

[IgorG]

Consider upgrade to Plesk 12 version. Performance of IIS operations has been seriously improved there - http://forum.parallels.com/showthread.php?294318-Plesk-12-0-Preview&p=725595&viewfull=1#post725595