React Redux : Problem with passing props and dispatch from container to component

I have a simple WORKING React-redux application which I tried to better organize into different folders like this:

component1.js

import React from "react";
class Presentational extends React.Component {
    constructor (props){
      super(props);
      this.state= {
        input:''
      }
      this.handleChange= this.handleChange.bind(this)
      this.submitMessage= this.submitMessage.bind(this)
    }
    handleChange (event) {
      this.setState ({
        input:event.target.value
      })
    }

    submitMessage () {
      this.props.submitNewMessage(this.state.input);
      this.setState({
        input:''
      })
    }

    render(){
      return (
        <div>
          <h2> Type a new Message </h2>
          <input value={this.state.input} onChange={this.handleChange}/>
          <br/>
          <button onClick={this.submitMessage}>Submit</button>
          <ul>
          {this.props.messages.map((message,idx) =>{
            return <li key={idx}>{message}</li>
          })}
          </ul>
        </div>
      )
    }
  }

export default Presentational;

container1.js

import { connect } from 'react-redux'
import { addMessage } from '../actions'
import Presentational from '../components'

const mapStateToProps = state => {
    return {
      messages: state
    }
  }
  const mapDispatchToProps = dispatch => {
    return {
      submitNewMessage :message => {
        dispatch(addMessage(message))
      }
    }
  }

  export default connect(mapStateToProps,mapDispatchToProps)(Presentational)

While the app works in the original app where all of the react-redux code is in 1 file, after separating the logic of the file into different folders, the app crashes and gives these errors:

TypeError: Cannot read property 'map' of undefined

Uncaught TypeError: this.props.submitNewMessage is not a function

It seems to me that the container1.js code isn't successfully 'mapping state to props' and 'mapping dispatch to props' for the Presentational component in component1.js.

Any idea what I did wrong?