Why can not I download the captcha usand imacros

I am trying to download the captcha of the page using imacros, but never download the image of the captcha in the corresponding folder, in my case it would be the TMP folder. Because I do not work the function ONDOWNLOAD , which I'm doing wrong, someone who can guide me.

URL GOTO=https://www.coinpayments.net/index.php?ref=fe31773be1c8558db56c7b9f3063ae08
        TAG POS=1 TYPE=A ATTR=TXT:Sign<SP>Up
        TAG POS=2 TYPE=DIV ATTR=TXT:Create<SP>New<SP>Account<SP>Please<SP>make<SP>it<SP>at<SP>le*
        'SEARCH SOURCE=REGEXP:\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b EXTRACT=$1

        TAG POS=1 TYPE=INPUT:TEXT FORM=ACTION:register ATTR=NAME:username CONTENT=examplethenomtest
        TAG POS=1 TYPE=INPUT:EMAIL FORM=ACTION:register ATTR=NAME:email1 CONTENT={{!EXTRACT}}
        TAG POS=1 TYPE=INPUT:EMAIL FORM=ACTION:register ATTR=NAME:email2 CONTENT={{!EXTRACT}}
        SET !ENCRYPTION NO
        TAG POS=1 TYPE=INPUT:PASSWORD FORM=ACTION:register ATTR=NAME:pass1 CONTENT=k1k1k1k1
        TAG POS=1 TYPE=INPUT:PASSWORD FORM=ACTION:register ATTR=NAME:pass2 CONTENT=k1k1k1k1
        TAG POS=1 TYPE=INPUT:CHECKBOX FORM=ACTION:register ATTR=ID:checkbox CONTENT=YES
        TAG POS=2 TYPE=INPUT:CHECKBOX FORM=ACTION:register ATTR=ID:checkbox CONTENT=YES

        SET url https://www.coinpayments.net/index.php?ref=fe31773be1c8558db56c7b9f3063ae08
        SET apikey apikey
        SET path C:\tmp\ 
        SET file freeditcoin.jpg
        SET tw 5

        TAB OPEN
        'TAB T=1
        PROXY ADDRESS=0.0.0.0:0
        'TAB CLOSEALLOTHERS
        SET !TIMEOUT_PAGE 10
        'URL GOTO={{url}}
        SET !ENCRYPTION NO
        SET !VAR1 EVAL("var randomNumber=Math.floor(Math.random()*10 + 1); randomNumber;")
        Wait Seconds={{!Var1}}
        FILEDELETE NAME={{path}}{{file}}
        ONDOWNLOAD FOLDER={{path}} FILE={{file}}

        TAG POS=1 TYPE=IMG ATTR=ID:captcha

        WAIT SECONDS=11

        SET !VAR1 EVAL("var randomNumber=Math.floor(Math.random()*10 + 1); randomNumber;")
        Wait Seconds={{!Var1}}

        WAIT SECONDS=6
        TAG POS=1 TYPE=DIV ATTR=ID:captcha CONTENT=EVENT:SAVE_ELEMENT_SCREENSHOT
        WAIT SECONDS=6