Can upload files in GUI but not PowerShell using WinSCP

################ Send to SFTP ########################
try
{
    # Load WinSCP .NET assembly
    Add-Type -Path "C:\Program Files (x86)\WinSCP\WinSCPnet.dll";
 
    #pass the new file to secure FTP
    # Setup session options
    $sessionOptions = New-Object WinSCP.SessionOptions -Property @{
        Protocol = [WinSCP.Protocol]::Sftp
        HostName = "HOST NAME"
        UserName = "USERNAME" 
        Password = 'PASSWORD' 
        SshHostKeyFingerprint = "ssh-dss 1024 FINGER PRINT"
        Timeout = 6000
    }
 
    $session = New-Object WinSCP.Session;
    try
    {
        $session.SessionLogPath = '\\NGN-IMAGE\NCTracks\Logs\winscp.log';
        
        ## Connect
        $session.Open($sessionOptions);
        
        $transferOptions = New-Object WinSCP.TransferOptions
        $transferOptions.AddRawSettings("NewerOnly", "0");
        $transferOptions.AddRawSettings("PreserveTimeDirs", "0");
        $transferOptions.AddRawSettings("ExcludeHiddenFiles", "0");
        $transferOptions.AddRawSettings("ExcludeEmptyDirectories", "0");
        $transferOptions.AddRawSettings("EncryptNewFiles", "1");
        $transferOptions.AddRawSettings("SendBuf", "0");
 
        $transferOptions.ResumeSupport.State = [WinSCP.TransferResumeSupportState]::Off
        $transferOptions.FilePermissions = $Null # This is default
        $transferOptions.PreserveTimestamp = $False
        $transferOptions.TransferMode = [WinSCP.TransferMode]::Binary
        $transferOptions.OverwriteMode = [WinSCP.OverwriteMode]::Overwrite
        
        ## copy file to SFTP
        $allFiles = -join($filepath,"*")
        $transferResult = $session.PutFiles($allFiles,$remotePath,$False,$transferOptions);
        $transferResult.Check();
        
        ##close connection
        $Session.Close()
    }
    finally
    {
        # Disconnect, clean up
        $session.Dispose();
    }
 
    $FinishedMailParams= @{
        To = 'ToEmail'
        From = 'FromEmail'
        Port = ''
        SmtpServer = 'SMTPServer'
        Subject = 'SUBJECT'
        Body = "EMAIL BODY"
    }
 
    Send-MailMessage @FinishedMailParams;
} 
catch
{
    ## send email
    $ErrorMailParams = @{
        To = 'ToEmail'
        From = 'FromEmail'
        Port = ''
        SmtpServer = 'SMTPServer'
        Subject = 'SUBJECT'
        Body = "Error: $($_.Exception.Message)"
    }
 
    Send-MailMessage @ErrorMailParams;
}

$sessionOptions.AddRawSettings("SendBuf", "0");

$transferOptions.ResumeSupport.State = [WinSCP.TransferResumeSupportState]::Off