diff --git a/WHATSNEW b/WHATSNEW
index 18aa0c68c..1a712b8f3 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -216,6 +216,8 @@ Other changes:
   <exclude> elements can be used to exclude certain packages from
   being parsed.  Bugzilla Report 17134.
 
+* The JProbe tasks now also work with JProbe 4.x.  Bugzilla Report 14849.
+
 Changes from Ant 1.5.2 to Ant 1.5.3
 ===================================
 
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovBase.java b/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovBase.java
index 5fa333ad6..85f9484d0 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovBase.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovBase.java
@@ -56,6 +56,7 @@ package org.apache.tools.ant.taskdefs.optional.sitraka;
 
 import java.io.File;
 import org.apache.tools.ant.Task;
+import org.apache.tools.ant.taskdefs.condition.Os;
 import org.apache.tools.ant.util.FileUtils;
 
 /**
@@ -68,6 +69,8 @@ import org.apache.tools.ant.util.FileUtils;
 public abstract class CovBase extends Task {
     private File home;
     private static FileUtils fu = FileUtils.newFileUtils();
+    private boolean isJProbe4 = false;
+    private static boolean isDos = Os.isFamily("dos");
 
     /**
      * The directory where JProbe is installed.
@@ -80,12 +83,43 @@ public abstract class CovBase extends Task {
         return home;
     }
 
-    protected File findJar(String relativePath) {
-        return fu.resolveFile(home, relativePath);
+    protected File findCoverageJar() {
+        File loc = null;
+        if (isJProbe4) {
+            loc = fu.resolveFile(home, "lib/coverage.jar");
+        } else {
+            loc = fu.resolveFile(home, "coverage/coverage.jar");
+            if (!loc.canRead()) {
+                File newLoc = fu.resolveFile(home, "lib/coverage.jar");
+                if (newLoc.canRead()) {
+                    isJProbe4 = true;
+                    loc = newLoc;
+                }
+            }
+        }
+        
+        return loc;
     }
 
     protected String findExecutable(String relativePath) {
-        return fu.resolveFile(home, relativePath).getAbsolutePath();
+        if (isDos) {
+            relativePath += ".exe";
+        }
+
+        File loc = null;
+        if (isJProbe4) {
+            loc = fu.resolveFile(home, "bin/" + relativePath);
+        } else {
+            loc = fu.resolveFile(home, relativePath);
+            if (!loc.canRead()) {
+                File newLoc = fu.resolveFile(home, "bin/" + relativePath);
+                if (newLoc.canRead()) {
+                    isJProbe4 = true;
+                    loc = newLoc;
+                }
+            }
+        }
+        return loc.getAbsolutePath();
     }
 
     protected File createTempFile(String prefix) {
@@ -93,6 +127,6 @@ public abstract class CovBase extends Task {
     }
 
     protected String getParamFileArgument() {
-        return "-jp_paramfile=";
+        return (!isJProbe4 ? "-jp_" : "") + "paramfile=";
     }
 }
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovMerge.java b/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovMerge.java
index bc78b698a..57e94b539 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovMerge.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovMerge.java
@@ -154,7 +154,7 @@ public class CovMerge extends CovBase {
         if (getHome() == null || !getHome().isDirectory()) {
             throw new BuildException("Invalid home directory. Must point to JProbe home directory");
         }
-        File jar = findJar("coverage/coverage.jar");
+        File jar = findCoverageJar();
         if (!jar.exists()) {
             throw new BuildException("Cannot find Coverage directory: " + getHome());
         }
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovReport.java b/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovReport.java
index c144c9c9e..538c4acf0 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovReport.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/CovReport.java
@@ -271,7 +271,7 @@ public class CovReport extends CovBase {
         if (getHome() == null) {
             throw new BuildException("'home' attribute must be set to JProbe home directory");
         }
-        File jar = findJar("coverage/coverage.jar");
+        File jar = findCoverageJar();
         if (!jar.exists()) {
             throw new BuildException("Cannot find Coverage directory: " + getHome());
         }
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/Coverage.java b/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/Coverage.java
index 70e299172..d89ad312d 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/Coverage.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/sitraka/Coverage.java
@@ -351,7 +351,7 @@ public class Coverage extends CovBase {
         if (getHome() == null || !getHome().isDirectory()) {
             throw new BuildException("Invalid home directory. Must point to JProbe home directory");
         }
-        File jar = findJar("coverage/coverage.jar");
+        File jar = findCoverageJar();
         if (!jar.exists()) {
             throw new BuildException("Cannot find Coverage directory: " + getHome());
         }