Spring: Get Bean in main Method fails

I'm relative new to Java and also to Spring Framework. So this is my first Spring App I'm building and I'm experiencing problems with Autowiring my Beans.

My Application.java:

@SpringBootApplication
public class Application {

public static void main(String[] args) throws Exception {
    SpringApplicationBuilder builder = new SpringApplicationBuilder(Application.class);
    builder.headless(false);
    ConfigurableApplicationContext ctx = builder.run(args);
    AppRepository oAppRepo = ctx.getBean(AppRepository.class);
    // Check the SystemTray is supported
    if (!SystemTray.isSupported()) {
        System.out.println("SystemTray is not supported");
        return;
    }
    CustomTray oTray = ctx.getBean(CustomTray.class);
    }
}

My config.xml in ressource folder:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:context="http://www.springframework.org/schema/context"
   xmlns:aop="http://www.springframework.org/schema/aop"
   xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
    ">

<context:property-placeholder location="classpath:/application.properties"/>
<context:component-scan base-package="app"/>
<import resource="beans/*.xml" />
</beans>

My beans/tray.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

<bean id="customTray" class="app.CustomTray">
    <property name="schedulerThread" value="app.SchedulerThread"></property>
    <property name="commandControlInterface" value="app.CommandControlInterface"></property>
</bean>
</beans>

The Error Message I get on Startup:

Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [app.CustomTray] is defined
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:371)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:331)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:968)
at app.Application.main(Application.java:46)

So I don't understand why there is no qualified Bean cause I registered the bean in tray.xml. The CustomTray class is derived from TrayIcon class and creates a TrayIcon nothing special but for completion, my CustomTray:

public class CustomTray extends TrayIcon {

private static final String IMAGE_PATH = "/images/icon.png";
private static final String TOOLTIP = "Test";

private PopupMenu popup;
private SystemTray tray;
@Autowired private AppRepository oAppRepo;

public CustomTray() {
    super(createImage(IMAGE_PATH, TOOLTIP), TOOLTIP);
    popup = new PopupMenu();
    tray = SystemTray.getSystemTray();
    try {
        this.setup();
    } catch (AWTException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

@PostConstruct
private void setup() throws AWTException {

}

protected static Image createImage(String path, String description) {
    URL imageURL = CustomTray.class.getResource(path);
    if (imageURL == null) {
        System.err.println("Failed Creating Image. Resource not found: " + path);
        return null;
    } else {
        return new ImageIcon(imageURL, description).getImage();
    }
    }
}

I got the App running before, without using Autowiring and Beans but now I want to refactor and setup a clean Spring App, I hope heres somebody who knows what I'm doing wrong.

edit: Ok so now if I'm Importing the xml-Files with the annotation mentioned by UUID I get another Error Message. The bean customTray got two properties, the SchedulerThread property shall be a Singleton Bean, too. It's declared in beans/scheduler.xml which itself also got a property which shall be a bean. like that:

scheduler.xml

    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="schedulerThread" class="app.SchedulerThread">
        <property name="processManager" value="app.ProcessManager"></property>
    </bean>
</beans>

Error:

Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.lang.String' to required type 'app.ProcessManager' for property 'processManager'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [app.ProcessManager] for property 'processManager': no matching editors or conversion strategy found

What is the best way to wire these classes and create the Beans? As I sayed I'm new to Spring and I think I didn't understood the way it's working with beans and autowiring.