using the new installer

Hi All,

I have just used the dhis2-2.1 live and it install on my machine without any error message. I now have my database in but my problem now is when I click on services and click on data entry my org unit and datasets are all available but when I click on a dataset and choose a period it just keep reading and not opening to the form. Also at the bottom of the screen it says Error on page.

Secondly I have two databases and I want to switch between them how do I go about doing that.