VNC - problem finding an image

I've problem finding an image/clicking on it.

After the connection I capture the VNC screen and the image contain the image.

The problem is in first click: scr.click("1541417310503.png")

Below my script

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import shutil

##############################################
screenType = 0 # 1 = screen(0), 2 = vnc screen
##############################################
scr = object()

def vncConnection(scr):
   try:
        scr=vncStart("127.0.0.1", 5900, 10, 1000, "vnc");
   except:
        print("exception: " , sys.exc_info()[0])
        print(" " , sys.exc_info()[1])
        print(" " , sys.exc_info()[2])
        return None
   if not scr:
       print "no connection"
       return None
   wait(3)
   return scr

items =("Nothing selected","VNC Screen","Your PC screen")
selected = select("Please select from list the type of screen", options = items)

if selected == None: # Esc button
    exit(-1)
if selected == items[0]:
    popup("No selection")
    exit(-2)
if selected == items[1]:
    screenType = 1;
if selected == items[2]:
    screenType = 2;
if screenType == 1:
    scr = vncConnection(scr)
    if scr == None:
        exit(-1)
if screenType == 2:
    scr = Screen(0)

###################################################

Settings.UserLogs = True #(False: user log calls are ignored)
Settings.UserLogPrefix = "user" #(message prefix)
Settings.UserLogTime = True
b=getBundleFolder()
Debug.setUserLogFile(b + "DebugSikuliX.log")
imagePath = b+'savedImages\\'

sPath=capture(scr)
print("sPath=" +sPath)
newImage = os.path.join(imagePath, "test" + ".png")
print("imagePath=" + imagePath + " newImage=" + newImage)

shutil.move(sPath, newImage)

scr.click("1541417310503.png")

while not scr.exists("2018-11-05_12h30_58.png"):
    src.sleep(1)
scr.click("2018-11-05_12h30_58.png")
scr.type ("notepad")
while not scr.exists("2018-11-05_12h41_45.png"):
    src.sleep(1)
scr.click("2018-11-05_12h41_45.png")
while not scr.exists("2018-11-05_12h56_53.png"):
    src.sleep(1)
scr.type('n', Key.CTRL)
while not scr.exists("1541427508737.png"):
    src.sleep(1)
scr.type(Key.ENTER)
scr.type ('Hello , nice to be here' + Key.ENTER)
a = scr.find("1543410943455.png").text()
print a

if screenType == 1:
    scr.stop()
    use()

###################################################

exit(0)

----------------------------------------------------------------------------------------------------------------
exception

CConnection: Server supports RFB protocol version 3.8
CConnection: Using RFB protocol version 3.8

sPath=C:\Users\mib1sbz\AppData\Local\Temp\Sikulix_81169589\sikuliximage-1543909964798.png
imagePath=C:\sviluppo\REACT\SikuliX\Test_BMartini\vnc.sikuli\savedImages\ newImage=C:\sviluppo\REACT\SikuliX\Test_BMartini\vnc.sikuli\savedImages\test.png

[error] script [ vnc ] stopped with error at line --unknown--
[error] Error caused by: Traceback (most recent call last): File "C:\sviluppo\REACT\SikuliX\Test_BMartini\vnc.sikuli\vnc.py", line 57, in <module> scr.click("1541417310503.png") Line 2277, in file Region.java
at org.sikuli.script.Region.wait(Region.java:2277)
at org.sikuli.script.Region.wait(Region.java:2295)
at org.sikuli.script.Region.getLocationFromTarget(Region.java:3270)
at org.sikuli.vnc.VNCScreen.getLocationFromTarget(VNCScreen.java:171)
at org.sikuli.script.Region.click(Region.java:3875)
at org.sikuli.script.Region.click(Region.java:3860)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
org.sikuli.script.FindFailed: FindFailed: 1541417310503.png: (39x37) in R[0,0 1680x1050]@S(0) E:Y, T:3.0 Line 2277, in file Region.j

ava

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- Window 7 64 bit SP1
- UltraVnc: VNC server version 1.2.1.1
- Siculix 1.1.4-SNAPSHOT-2018-10-26_10/Windows6.1/Java8(64)1.8.0_191-b12

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Thank you in advance.