Task Schedule for Full Backup on SQL Express

Hello, 

I am following Microsoft recommendation to automate Full Backup on a SQL 2005 Express Edition. (https://support.microsoft.com/en-us/kb/2019698)

My instance name is INF-PCOUNTER\SQLEXPRESS. 

However when I am running the below on SQLCMD

sqlcmd -S INF-PCOUNTER\SQLEXPRESS –E -Q "EXEC sp_BackupDatabases @backupLocation='D:\SQLBackups\', @backupType='F'" 

and it's coming up with error Sqlcmd: '-E': Unexpected argument. Enter '-?' for help.

Could anybody confirm what issue it appears?

Best regards, 

Mohan