adding a ticket takes about 34 seconds to add to a new project.

Switching between projects or list tickets are going fast. (< 1sec). There are about 50 tickets in the project. But add a new ticket takes in 90% about 34 seconds to add this ticket. In 10% it takes only 1 second.
Installation: Virtual Windows Server (2008) with BITNAMI Redmine Stack.

Any suggestions ?
(i am relative new to redmine at all).

Thanks,