The report server at 'http://localhost/ReportServer' is running SQL Server version 9.0, which is incompatible with SQL Server 2008 R2 Business Intelligence Development Studio. A report server running SQL Server version 10.0 or later is required.

Hi,
we've already SSRS report application in SQL 2005, running in production. we are looking to migrate it into SQL 2012.
whlie deployment of report in SQL 2012 getting Exception: 

Error :The report server at 'http://localhost/ReportServer' is running SQL Server version 9.0, which is incompatible with SQL Server 2008 R2 Business Intelligence Development Studio. A report server running SQL Server version 10.0 or later is required.

please assist me how to achive without re-development.