Microsoft SQL Server, Error:1827

I have installed SqlServer 2005 evalution version. The file size is now 4035. When I tried to add new data file name,I am getting the below error.
Pls can any one help me.

Alter failed for database 'test'. (Microsoft.SqlServer.Smo)

An exception occured while executing a Transact-SQL statement or batch(Microsoft.SqlServer.ConnectionInfo)

Create DATABASE or ALTER DATABASE failed because the resulting cumulative database size would exceed your licensed limit of 4096MB per database (Microsoft SQL Server, Error:1827)