diff --git a/script/users/X-Treme users/launchOTF.py b/script/users/X-Treme users/launchOTF.py
index 9a2fb655..403a33fd 100644
--- a/script/users/X-Treme users/launchOTF.py	
+++ b/script/users/X-Treme users/launchOTF.py	
@@ -14,6 +14,8 @@ time.sleep(3.0)
 print "done setting energy."
 
 
+caput('X03DA-OP-VG7:WT_SET',0)   #open ES vacuum valve
+time.sleep(0.2)
 caput('X03DA-OP-VG7:WT_SET',1)   #open ES vacuum valve
 caput('X03DA-OP-ST1:WT_SET_CLOSE',0)  # 
 caput('X03DA-OP-ST1:WT_SET_OPEN',1) # open ES Shutter