SFTP Chilkat error "Expected KEX_DH_GEX_GROUP" - sftp

Question

I am trying to connect to an SFTP but am getting the following error from Chilkat in the function sftp.Connect(hostname, port)...
DllDate: Dec 22 2010
UnlockPrefix: *
Username:
Component: .NET 2.0
SftpVersion: 0
hostname: ...
port: 22
ConnectTimeoutMs: 50000
calling ConnectSocket2
This is an IPV4 numeric address...
Connect using IPV4.
ipAddress: ...*
socketHandle: 0x804
ai_addrlen: 16
ai_addr: 0200 0016 4B7F 64D8 0000 0000 0000 0000
myIP_3: **.***.***.***
myPort_3: *****
connect successful.
Established TCP/IP connection with SSH server
clientIdentifier: SSH-2.0-PuTTY_Local:_May_11_2009_17:22:38
initialDataFromSshServer: SSH-2.0-0.0
serverVersion: SSH-2.0-0.0
KeyExchangeAlgs:
algorithm: diffie-hellman-group1-sha1
algorithm: diffie-hellman-group-exchange-sha1
algorithm: diffie-hellman-group14-sha1
HostKeyAlgs:
algorithm: ssh-dss
EncCS:
algorithm: aes256-cbc
algorithm: aes192-cbc
algorithm: aes128-cbc
algorithm: twofish-cbc
algorithm: blowfish-cbc
algorithm: 3des-cbc
algorithm: arcfour
EncSC:
algorithm: aes256-cbc
algorithm: aes192-cbc
algorithm: aes128-cbc
algorithm: twofish-cbc
algorithm: blowfish-cbc
algorithm: 3des-cbc
algorithm: arcfour
MacCS:
algorithm: hmac-sha1
algorithm: hmac-sha1-96
algorithm: hmac-md5
algorithm: hmac-md5-96
MacSC:
algorithm: hmac-sha1
algorithm: hmac-sha1-96
algorithm: hmac-md5
algorithm: hmac-md5-96
CompCS:
algorithm: zlib
algorithm: none
CompSC:
algorithm: zlib
algorithm: none
Encryption: 256-bit AES
Encryption: 256-bit AES
MAC: HMAC-SHA1
MAC: HMAC-SHA1
Compression: none
Compression: none
Key Exchange: DH Group Exchange SHA1
Host Key Algorithm: DSS
numBits: 160
pbits: 2048
Using GEX Group.
Sending KEX_DH_GEX_REQUEST...
pbits: 2048
Unexpected message received. Expected KEX_DH_GEX_GROUP.
msgType: 1
Failed.
I am primarily using the 4 functions to connect to SFTP
sftp.UnlockComponent(ChilkatKey);
sftp.Connect(hostname, port);
sftp.AuthenticatePw(username, password);
sftp.InitializeSftp();
What am I missing ?
Thanks for your help.

Answer 1

correct order should be like as yours:
sftp.UnlockComponent(ChilkatKey);
sftp.Connect(hostname, port);
sftp.AuthenticatePw(username, password);
sftp.InitializeSftp();
but after those guys, u need to call OpenDir and ReadDir(if you need to get files count on remote folder) methods like;
string handler = sftp.OpenDir("remote_path");
SFtpDir compassDir = sftp.ReadDir(handler);
to just download a file you don't need to call ReadDir but OpenDir must be called.
After the populating compassDir object you can get file count by;
int fileAmount = compassDir.NumFilesAndDirs
or you can download files by name like;
sftp.DownloadFileByName("local_path","Remote_path_with_file_name");
Sorry for the typo error.