No password prompt for ssh from perl script

[Aftab Ahamed]

Hi,
I need some help from you guys for one issue I am facing with my script. 
While logging into localhost using ssh from command prompt it works:
   It works from command prompt --> ssh loginid at localhost

But when we try to login to localhost using ssh from perl script using 
pseudo terminal, I am getting the following without any password prompt.

We are getting following instead of password prompt:
Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,password,keyboard-interactive)

We are using OpenSSH in AIX 5.3 and Perl 5.8.2

Any one has any idea on this why this issue might have occured. If anyone 
wants to see the code, I can send it. It would be great help if anyone can 
help in this regard

Thanks
Aftab

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