diff --git a/CASA/micasad/cache/MPFileWatcher.cs b/CASA/micasad/cache/MPFileWatcher.cs
index 390abddf..a8154361 100644
--- a/CASA/micasad/cache/MPFileWatcher.cs
+++ b/CASA/micasad/cache/MPFileWatcher.cs
@@ -106,11 +106,22 @@ namespace sscs.cache
 				fs.Write(m_baMP, 0, m_baMP.Length);
 				fs.Flush();
 				fs.Close();
+				
+				File.SetAttributes(m_dir + m_filename, FileAttributes.Hidden);				
+			}
+			catch (Exception e)
+			{
+				LogMessage(e.ToString());
+			}
 
-				fs = new FileStream(m_dir + m_filename + ".IV", FileMode.Create);
+			try
+			{				
+				FileStream fs = new FileStream(m_dir + m_filename + ".IV", FileMode.Create);
 				fs.Write(m_baMPIV, 0, m_baMPIV.Length);
 				fs.Flush();
 				fs.Close();			
+
+				File.SetAttributes(m_dir + m_filename + ".IV", FileAttributes.Hidden);
 			}
 			catch (Exception e)
 			{