diff --git a/dist/DiscoSheep.jar b/dist/DiscoSheep.jar
index 5fb5588..5e1b1b7 100644
Binary files a/dist/DiscoSheep.jar and b/dist/DiscoSheep.jar differ
diff --git a/src/gibstick/bukkit/discosheep/DiscoParty.java b/src/gibstick/bukkit/discosheep/DiscoParty.java
index 5ef8a82..345d4be 100644
--- a/src/gibstick/bukkit/discosheep/DiscoParty.java
+++ b/src/gibstick/bukkit/discosheep/DiscoParty.java
@@ -94,7 +94,7 @@ public class DiscoParty {
 	}
 
 	public DiscoParty setDuration(int duration) throws IllegalArgumentException {
-		if (duration <= DiscoParty.maxDuration || duration > 0) {
+		if (duration <= DiscoParty.maxDuration && duration > 0) {
 			this.duration = duration;
 			return this;
 		} else {
@@ -103,7 +103,7 @@ public class DiscoParty {
 	}
 
 	public DiscoParty setPeriod(int period) throws IllegalArgumentException {
-		if (period >= DiscoParty.minPeriod || period <= DiscoParty.maxPeriod) {
+		if (period >= DiscoParty.minPeriod && period <= DiscoParty.maxPeriod) {
 			this.period = period;
 			return this;
 		} else {
@@ -112,7 +112,7 @@ public class DiscoParty {
 	}
 
 	public DiscoParty setRadius(int radius) throws IllegalArgumentException {
-		if (radius <= DiscoParty.maxRadius || radius > 0) {
+		if (radius <= DiscoParty.maxRadius && radius > 0) {
 			this.radius = radius;
 			return this;
 		} else {
@@ -121,7 +121,7 @@ public class DiscoParty {
 	}
 
 	public DiscoParty setSheep(int sheep) throws IllegalArgumentException {
-		if (sheep <= DiscoParty.maxSheep || sheep > 0) {
+		if (sheep <= DiscoParty.maxSheep && sheep > 0) {
 			this.sheep = sheep;
 			return this;
 		} else {
diff --git a/src/gibstick/bukkit/discosheep/DiscoSheepCommandExecutor.java b/src/gibstick/bukkit/discosheep/DiscoSheepCommandExecutor.java
index 510bece..df3cc46 100644
--- a/src/gibstick/bukkit/discosheep/DiscoSheepCommandExecutor.java
+++ b/src/gibstick/bukkit/discosheep/DiscoSheepCommandExecutor.java
@@ -187,6 +187,7 @@ public class DiscoSheepCommandExecutor implements CommandExecutor {
 			} else if (args[i].equalsIgnoreCase("-r")) {
 				try {
 					mainParty.setRadius(parseNextIntArg(args, i));
+					sender.sendMessage("RADIUS OK");
 				} catch (IllegalArgumentException e) {
 					sender.sendMessage("Radius must be an integer within the range [1, "
 							+ DiscoParty.maxRadius + "]");
@@ -195,6 +196,7 @@ public class DiscoSheepCommandExecutor implements CommandExecutor {
 			} else if (args[i].equalsIgnoreCase("-n")) {
 				try {
 					mainParty.setSheep(parseNextIntArg(args, i));
+					sender.sendMessage("SHEEP OK");
 				} catch (IllegalArgumentException e) {
 					sender.sendMessage("The number of sheep must be an integer within the range [1, "
 							+ DiscoParty.maxSheep + "]");
@@ -203,6 +205,7 @@ public class DiscoSheepCommandExecutor implements CommandExecutor {
 			} else if (args[i].equalsIgnoreCase("-t")) {
 				try {
 					mainParty.setDuration(parent.toTicks(parseNextIntArg(args, i)));
+					sender.sendMessage("DURATION OK");
 				} catch (IllegalArgumentException e) {
 					sender.sendMessage("The duration in seconds must be an integer within the range [1, "
 							+ parent.toSeconds(DiscoParty.maxDuration) + "]");
@@ -211,6 +214,7 @@ public class DiscoSheepCommandExecutor implements CommandExecutor {
 			} else if (args[i].equalsIgnoreCase("-p")) {
 				try {
 					mainParty.setPeriod(parseNextIntArg(args, i));
+					sender.sendMessage("PERIOD OK");
 				} catch (IllegalArgumentException e) {
 					sender.sendMessage(
 							"The period in ticks must be within the range ["