configuration transfer over scp on commit not working on Juniper EX-2200 switch

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http://serverfault.com – I am making a series of configuration changes on Junos EX- 2200 switch.I have this router connected to another PC via an ethernet cable.The IP address of the switch is am able to ping from to and vice-versa. After the changes I make I do the following commands set system archival configuration transfer-on-commit set system archival configuration archive-sites "scp://[email protected]:/home/karthik/ws_karthik/sw1_config_1.txt" password godfather commit Where there is a user with user-name "karthik " and password "godfather".The path shown above als (HowTos)