diff --git a/src/com/dre/dungeonsxl/signs/SIGNMob.java b/src/com/dre/dungeonsxl/signs/SIGNMob.java
index 502d7a67..87485e11 100644
--- a/src/com/dre/dungeonsxl/signs/SIGNMob.java
+++ b/src/com/dre/dungeonsxl/signs/SIGNMob.java
@@ -34,15 +34,23 @@ public class SIGNMob extends DSign {
 
 	@Override
 	public boolean check() {
-		// TODO Auto-generated method stub
+		String lines[] = sign.getLines();
+		if (!lines[1].equals("") && !lines[2].equals("")) {
+			if (lines[1] != null) {
+				String[] atributes = lines[2].split(",");
+				if (atributes.length == 2) {
+					return true;
+				}
+			}
+		}
 
-		return true;
+		return false;
 	}
 
 	@Override
 	public void onInit() {
 		String lines[] = sign.getLines();
-		if (lines[1] != "" && lines[2] != "") {
+		if (!lines[1].equals("") && !lines[2].equals("")) {
 			String mob = lines[1];
 			if (mob != null) {
 				String[] atributes = lines[2].split(",");
diff --git a/src/com/dre/dungeonsxl/signs/SIGNMsg.java b/src/com/dre/dungeonsxl/signs/SIGNMsg.java
index 3403f648..445295ee 100644
--- a/src/com/dre/dungeonsxl/signs/SIGNMsg.java
+++ b/src/com/dre/dungeonsxl/signs/SIGNMsg.java
@@ -23,7 +23,9 @@ public class SIGNMsg extends DSign {
 
 	@Override
 	public boolean check() {
-		// TODO Auto-generated method stub
+		if (sign.getLine(1).equals("")) {
+			return false;
+		}
 
 		return true;
 	}
@@ -32,7 +34,7 @@ public class SIGNMsg extends DSign {
 	public void onInit() {
 		String lines[] = sign.getLines();
 
-		if (lines[1] != "" && lines[2] != "") {
+		if (!lines[1].equals("")) {
 			String msg = gworld.config.getMsg(p.parseInt(lines[1]), true);
 			if (msg != null) {
 				this.msg = msg;
diff --git a/src/com/dre/dungeonsxl/signs/SIGNPlace.java b/src/com/dre/dungeonsxl/signs/SIGNPlace.java
index 183bf69d..9ae7206d 100644
--- a/src/com/dre/dungeonsxl/signs/SIGNPlace.java
+++ b/src/com/dre/dungeonsxl/signs/SIGNPlace.java
@@ -17,7 +17,9 @@ public class SIGNPlace extends DSign {
 
 	@Override
 	public boolean check() {
-		// TODO Auto-generated method stub
+		if (sign.getLine(1).equals("")) {
+			return false;
+		}
 
 		return true;
 	}
diff --git a/src/com/dre/dungeonsxl/signs/SIGNSoundMsg.java b/src/com/dre/dungeonsxl/signs/SIGNSoundMsg.java
index 2a57fa43..e3f81065 100644
--- a/src/com/dre/dungeonsxl/signs/SIGNSoundMsg.java
+++ b/src/com/dre/dungeonsxl/signs/SIGNSoundMsg.java
@@ -28,7 +28,9 @@ public class SIGNSoundMsg extends DSign {
 
 	@Override
 	public boolean check() {
-		// TODO Auto-generated method stub
+		if (sign.getLine(1).equals("")) {
+			return false;
+		}
 
 		return true;
 	}
@@ -37,7 +39,7 @@ public class SIGNSoundMsg extends DSign {
 	public void onInit() {
 		String lines[] = sign.getLines();
 
-		if (lines[1] != "" && lines[2] != "") {
+		if (!lines[1].equals("")) {
 			String msg = gworld.config.getMsg(p.parseInt(lines[1]), true);
 			if (msg != null) {
 				this.msg = msg;