Try with the listed algorithm, there are supported by Putty and see if it works to make sure that's the real problem. I did try an openssh converted key with a server I'm having direct root access and that is ok. But I still can't connect the other server with the putty 1024 generated key. :( So no...

Thank you My key has been generated with PuTTYgen. Type of key is SSH-2 RSA at 1024 bits. It seems to be very common and standard since it is the default setting in puTTYgen... So the problem would be that ? Your software would not be compatible with the more common possible key generator ? I can't ...

I use generally a SSH FTP connexion to manage my server. It works fine from my pC with WinSCP. I have a private key that is perfectly handeld by Winscp. name of server specific port username no password private key chosen even password of the key entered With AndFTP the sameexact process always says...