Can't disable echo option

Using the Telnet client example provided in the examples, when I connect to one of my local server, it is echoing the data back.

For instance, I am trying to connect some <ip_address>, Usually from the server, I get the following response,

User Access Verification

Username : USER1

When I enter this username, the same one is echoed back as,

Username : USER1 USER1
Password:

I tried in all ways by taking support from stackoverflow but no luck.

Seriously some one have a look at this issue.

Thanks,
RK