Hi all, 

I have a problem that when I was trying to delete the sample site and reintall it, I found that I cannot delete the database that the site was using. The winzard is shown as below: 

Web Site

To Delete : Alloy (http://xinpei-pc:17000/)

Delete Actions

Force delete any read-only files in application files folder : True
Force delete any read-only files in external files folder : True
Delete external folders used by this application : True
Restart the Application Pool before deleting files : True
Delete the database login used by this application : True
Delete the IIS Application Pool if not used by other applications : True
Delete the EPiServer application files folder used by this application : True
Delete the database used by this application : False

Database Access

Use Windows Authentication when connecting to the database server : True

Related Web Sites

Index directories to be deleted

E:\EPiServer\VPP\Alloy\Index :

So how can I remove the database manually? 

Anyone can provide a thought? 

Thanks!