Change of Database name in cognos10 content store

Right-click the "content store" delete it. Right click on the "content manager" create new Give it a name you can give the same name "content Store". click next it will ask the type of database select MSSQL server and create. then specify the database name in the MSSQL server to content it to the required database.

1. Open the IBM Cognos Configuration
2. Go to Database Access,
Select ContentStore then right click on it then Delete
after that
Select ContentManaget then right click on it then Select New Source->Database->Name:xxxxx -> Type MSSQL Server-> Click OK and give the User Name and Password.

I created value prompt, when I select Few values in prompt these values showing in report header between (,)s.
I need (-) in between two values.
Could you please suggest me.