Restoring database from sql2014 to sql2005

I want restore the database from sqlserver 2014 to sqlserver 2005. So I have tried it by generating script from sqlserver 2014 and executing in sqlserver 2005 version. This database contains around 4 GB size. We got an error during the execution of the query

“Could not allocate space for object 'sys.syscolpars'.'clst' in database 'xy' because the 'PRIMARY' filegroup is full. Create disk space by deleting unneeded files, dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup.”

We are getting error an error on following code

CREATE TABLE [dbo].[rff_aud](
        [rff_id] [int] NOT NULL,
        [rff_ud] [varchar](35) NOT NULL,
        [auth_number] [varchar](35) NULL,
        [rff_status_id] [int] NOT NULL,
        [rff_urgency_id] [int] NOT NULL,
        [elig_id] [int] NOT NULL,
        [rff_provider_id] [int] NOT NULL,
        [rff_category_id] [int] NULL
) 
SET ANSI_PADDING ON
ALTER TABLE [dbo].[rff_aud] ADD [pri_diagnosiscode_ud] [varchar](35) NULL

  

We are using the sql server version Microsoft SQL Server 2005 - 9.00.1399.06.

Also my database configuration is

Can any one help us why we are getting the error on my database. But I could execute sucessfully the above code on new database on the same server.