diff --git a/samples/DateStringPatterns.py b/samples/DateStringPatterns.py
old mode 100644
new mode 100755
diff --git a/samples/RecurringMultipleReadProperty.py b/samples/RecurringMultipleReadProperty.py
old mode 100644
new mode 100755
diff --git a/samples/TCPClient.py b/samples/TCPClient.py
old mode 100644
new mode 100755
diff --git a/samples/TCPClient25.py b/samples/TCPClient25.py
index 458fe48a..4f51f78e 100755
--- a/samples/TCPClient25.py
+++ b/samples/TCPClient25.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.5
 
 """
 This simple TCP client application connects to a server and sends the text
diff --git a/samples/TCPServer25.py b/samples/TCPServer25.py
index 604aeb3c..96c11bb1 100755
--- a/samples/TCPServer25.py
+++ b/samples/TCPServer25.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.5
 
 """
 This simple TCP server application listens for one or more client connections