Problem with rsh (remote shell)

Hi!
I'm spanish and my english is not very good. I'm development a soft that connect with router cisco with rsh. And i have to send rsh commands but i can't. From my Linux shell command a request rsh:
rsh 192.168.1.5 cisco-rsh
cisco-rsh is a user that has privileges.
A configuration of my FastEthernet0/0 on my router(cisco 2600) is:
no ip rcmd domain-lookup
ip rcmd rcp-enable
ip rsh-enable
ip rcmd remote-host cisco-rsh 192.168.1.33 cisco-rsh enable
ip rcdm remote-username cisco-rsh
ip rcmd source-interface FastEthernet0/0
Then what is my problem? only can use rsh because my teacher is required.

To enable the Cisco IOS software to receive incoming remote shell (rsh) protocol and remote copy (rcp) protocol requests, customers must configure an authentication database to control access to the router. This configuration is accomplished by using the ip rcmd remote-host command.
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t8/feature/guide/ftAuth.html

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