I tried this but it does not work... any ideas?

exec sp_attach_single_file_db N'MyxxDb' , N'E:\SQLServerData\MSSQL\Data\xx_Data.MDF'

I got the error and the log file is not created...

I tried also:

EXEC sp_attach_single_file_db @dbname = N'Altiris',

   @physname = N'E:\AeXNS_Data.mdf'

EXEC sp_attach_db @dbname = N'AeXNS_Data',

   @filename1 = N'E:\AeXNS_Data.mdf',

   @Filename2 = N'F:\AeXNS_Log.LDF'

nothing is working...