Sending browser.screenshot over DRb (watir-webdriver)

HI,

I am following:http://watirwebdriver.com/screenshots/ and I am
assigning

file=browser.screenshot, i.e assigned to an object, in the server side
if I do file.save it errors :

Error Connection refused - connect(2)

and the saved file remains 0 bytes.

Where from this connection come?

Do I need to save the screenshot in some other format ? like string or
base64?

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