Hi Adriana,
i assume for a moment that you try to make a ssh connection from a Windows host. And that you are logged in on this Windows host, with say: somedomain\Adriana . Start a command prompt and change to the folder containing putty.exe and plink.exe .
Then type the command: plink -l root -pw passwordofroot ipadressoftheNetAppfiler with the bolded text literraly and for the italic text something appropriate filled in.
Do you receive the " ... key is not cached in the registry ... Store key in cache? (y/n) " output?
Does the plink connection succeed? That is: are you logged in on the NetApp filer, and then if you type in NetApp commands, do you see the output of these commands appear in your command screen window?
Let's first make sure your plink connection works allright, then next we go on with your putty connection.
Cheers