diff --git a/pom.xml b/pom.xml
index 6b69e31..088665d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,6 +69,11 @@
 			<artifactId>spring-webmvc</artifactId>
 			<version>${org.springframework.version}</version>
 		</dependency>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.10</version>
+		</dependency>
 	</dependencies>
 
 	<build>
diff --git a/src/main/java/de/ctdo/bunti/dmx/DMX.java b/src/main/java/de/ctdo/bunti/dmx/DMX.java
index 72b795a..5f72185 100644
--- a/src/main/java/de/ctdo/bunti/dmx/DMX.java
+++ b/src/main/java/de/ctdo/bunti/dmx/DMX.java
@@ -2,9 +2,9 @@ package de.ctdo.bunti.dmx;
 
 public final class DMX {
 
-    public static final int DMX_CHANNELS_MAX      = (byte) 511;
+    public static final int DMX_CHANNELS_MAX      = 511;
     public static final int DMX_CHANNELS_MIN      = 0;
-    public static final int DMX_CHANNEL_VALUE_MAX = (byte) 255;
+    public static final int DMX_CHANNEL_VALUE_MAX = 255;
     public static final int DMX_CHANNEL_VALUE_MIN = 0;
 
     /**
diff --git a/src/main/java/de/ctdo/bunti/model/BuntiDMXDevice.java b/src/main/java/de/ctdo/bunti/model/BuntiDMXDevice.java
index b5ddaed..12359f1 100644
--- a/src/main/java/de/ctdo/bunti/model/BuntiDMXDevice.java
+++ b/src/main/java/de/ctdo/bunti/model/BuntiDMXDevice.java
@@ -111,7 +111,7 @@ public abstract class BuntiDMXDevice extends BuntiDevice {
 		Map<Integer,Integer> map = new HashMap<Integer, Integer>();
 		
 		for (DMXChannel channel : dmxChannels.getAllChannels()) {
-			int index = channel.getOffset() + (startAddress - DMX.DMX_STARTADDRESS_OFFSET);
+			int index = channel.getOffset() + startAddress + DMX.DMX_STARTADDRESS_OFFSET;
 			
 			if(index >= DMX.DMX_CHANNELS_MIN && index <= DMX.DMX_CHANNELS_MAX){
 				map.put(index, channel.getValue());
@@ -130,7 +130,7 @@ public abstract class BuntiDMXDevice extends BuntiDevice {
 			
 			if(channel != null) {
 				try {
-					byte value = Byte.parseByte(opt.getValue().toString());
+					int value = Integer.parseInt(opt.getValue().toString());
 					
 					setChannelValueByName(channel.getName(), value);	
 					
diff --git a/src/main/java/de/ctdo/bunti/model/Par56Spot.java b/src/main/java/de/ctdo/bunti/model/Par56Spot.java
index 784757e..c5162b9 100644
--- a/src/main/java/de/ctdo/bunti/model/Par56Spot.java
+++ b/src/main/java/de/ctdo/bunti/model/Par56Spot.java
@@ -16,7 +16,7 @@ public class Par56Spot extends BuntiDMXDevice {
 
 
 		addChannel(new DMXChannel(0, CHANNEL_MODE));
-		addChannel(new DMXChannel(1, "red"));
+		addChannel(new DMXChannel(1, CHANNEL_RED));
 		addChannel(new DMXChannel(2, CHANNEL_GREEN));
 		addChannel(new DMXChannel(3, CHANNEL_BLUE));
 		addChannel(new DMXChannel(4, CHANNEL_SPEED));