There are already some questions arround cp5 and Lists but i was not able to solve "my" problem so far. Maybe someone out there knows a solution - would be great.

In my Program there are some images and lines plus some cp5 elements which woorks fine so far. But if i want to ad a cp5 ListItem, it won't work properly until i set the background to some int value in the draw function. e.g -> background(128); As soon as i set the background to some value, the List works fine but all the other elements disapear.

I have Processing 2.0b8 installed but i'm using the Sublime Text 2 IDE.

Here is the Code. I'ts more or less taken from the cp5 example. I deleted most of the comments in order to limit the list.
Thank you for the help and sorry for my english.

1. import controlP5.*;
2. ControlP5 cp5;
3. DropdownList d1;
4. int cnt = 0;
5. PImage appHeader;
6. PImage device;
7. void setup() {
8.   size(1000, 830, P3D);
9.   cp5 = new ControlP5(this);
10.   // create a DropdownList
11.   d1 = cp5.addDropdownList("myList-d1")
12.     .setPosition(100, 100)
13.       ;
14.   customize(d1); // customize the first list
15.   // --------------- GUI OBEN ------------------
16.   appHeader = loadImage("header.png");
17.   image(appHeader, 0, 0); // position des headers
18.   // --------------- DEVICE ------------------
19.   device = loadImage("device.png");
20.   image(device, 70, 140); // position of device
21. }
22. void customize(DropdownList ddl) {
23.   // a convenience function to customize a DropdownList
24.   ddl.setBackgroundColor(color(190));
25.   ddl.setItemHeight(20);
26.   ddl.setBarHeight(15);
27.   ddl.captionLabel().set("HTC One X");
28.   ddl.captionLabel().style().marginTop = 3;
29.   ddl.captionLabel().style().marginLeft = 3;
30.   ddl.valueLabel().style().marginTop = 3;
31.   ddl.addItem("Samsung Galaxy S4", 0);
32.   ddl.addItem("Google Nexus 4 ", 1);
33.   //ddl.scroll(0);
34.   ddl.setColorBackground(color(60));
35.   ddl.setColorActive(color(255, 128));
36. }
37. void controlEvent(ControlEvent theEvent) {
38.   if (theEvent.isGroup()) {
39.     // check if the Event was triggered from a ControlGroup
40.     println("event from group : "+theEvent.getGroup().getValue()+" from "+theEvent.getGroup());
41.   }
42.   else if (theEvent.isController()) {
43.     println("event from controller : "+theEvent.getController().getValue()+" from "+theEvent.getController());
44.   }
45. }
46. void draw() {
47. }