Error on sFTP Socket

Hi.

I've a issue with PHP extensions and sFTP. I get since yesterday the error message below. The days before it runs fine. I don't understand the error message. Pls can anyone have a look to it and tell me what goes wrong ...

Thx.

grunon

ChilkatLog:
  InitializeSftp:
    DllDate: Mar 12 2016
    ChilkatVersion: 9.5.0.56
    UnlockPrefix: xxxxxxxxxxxxxx
    Architecture: Little Endian; 64-bit
    Language: Linux PHP
    VerboseLogging: 0
    SshVersion: SSH-2.0-OpenSSH_6.6.1
    SftpVersion: 0
    Component successfully unlocked using purchased unlock code.
    sshTransportOpenChannel:  channelType: session
    clientChannel: 0
    clientInitialWindowSize: 327680
    clientMaxPacketSize: 32768
    Sent open channel request
    errno: 104
    osErrorMessage: Connection reset by peer
    numBytesRequested: 16
    Failed to receive data on the TCP socket
    Failed to read 1st block_size bytes..
    sshRawPacket: Socket fatal error.
    sshReadMessage: Socket fatal error.
    Error reading channel response.
    --sshTransportOpenChannel
    Socket connection lost, channel closed.
    Failed.
 --InitializeSftp
--ChilkatLog