Can not render element?

[yuanzhaocyc]

<Text>test</Text> can render,but Form can not.
my code:

import React, { Component } from 'react'
import { reduxForm } from 'redux-form'
import {
  ActionsContainer,
  Button,
  FieldsContainer,
  Fieldset,
  Form,
  FormGroup,
  Label,
} from 'react-native-clean-form'
import {
  Input,
  Switch
} from 'react-native-clean-form/redux-form'
import { View,Text,Image } from 'react-native'
class ContactForm extends Component {
  constructor(props){
  	super(props);
  }
  render(){
  	const {handleSubmit, authenticate, submitting} = this.props;
  	return (
		<View>
			<Text>test</Text>
			<Form>
				<FieldsContainer>
					<Fieldset label="Contact details">
						<Input inlineLabel={false} name="first_name" label="First name" placeholder="John" />
						<Input inlineLabel={false} name="email" label="Email" placeholder="something@domain.com" />
					</Fieldset>
					<Fieldset label="Shipping details" last>
						<Input inlineLabel={false} name="password" label="Address" placeholder="Hejrevej 33" />
						<Input inlineLabel={false} name="password_repeat" label="City" placeholder="Copenhagen" />
						<Switch inlineLabel={false} label="Save my details" border={false} name="save_details" />
					</Fieldset>
				</FieldsContainer>
				<ActionsContainer>
					<Button icon="md-checkmark" iconPlacement="right" onPress={()=>{this.props.onSubmit}} submitting={submitting}>Save</Button>
				</ActionsContainer>
			</Form>
		</View>
	)
  }
}

ContactForm = reduxForm({
  form: 'Form'
})(ContactForm)

[yuanzhaocyc]

it's ok to give the form a width and height,but why not styled?