diff --git a/libs/keyLib.php b/libs/keyLib.php
index a321677..113db0e 100755
--- a/libs/keyLib.php
+++ b/libs/keyLib.php
@@ -109,7 +109,7 @@
 	{
 		if (!isset($fileName) || !isset($keyData))
 			return false;
-		$handle = fopen($fileName, 'w+');
+		$handle = fopen($fileName, 'c');
 		if ($handle == null)
 			return false;
 		// debug code
@@ -122,7 +122,9 @@
 
 		//use exclusive lock for writing
 		flock($handle, LOCK_EX);
+		ftruncate($handle, 0);
 		$res = fwrite($handle, $data);
+		fflush($handle);
 		flock($handle, LOCK_UN);
 		// debug Code
 		//if ($res == false)
diff --git a/libs/loggingLib.php b/libs/loggingLib.php
index da5f4af..4a4bf7f 100755
--- a/libs/loggingLib.php
+++ b/libs/loggingLib.php
@@ -200,7 +200,7 @@
 	 */
 	function WriteLogFile($fileName, &$questionData, &$tutorData, &$commentData)
 	{
-		$handle = fopen($fileName, 'w');
+		$handle = fopen($fileName, 'c');
 		if (!$handle)
 			return false;
 		// write disclaimer and question data block identifier
@@ -234,7 +234,9 @@
 		// write the generated data to the file and close it
 		// use exclusive lock
 		flock($handle, LOCK_EX);
+		ftruncate($handle, 0);
 		fwrite($handle, $fileData);
+		fflush($handle);
 		flock($handle, LOCK_UN);
 		fclose($handle);
 		return true;