Translation of 閉まらくなった


I have the following to translate.

[code]

    車は、
    古くて、
    パワーウインドーの窓が時々閉まらくなったり、
    ヘッドライトが消えなくなったりして
    困るので、
    主人に早めに直してもらわなくてはなりません。
    
[/code]

So far I have the following.

[code]

    The car
    is old and
    it does things like the power windows sometimes become ...
    and the headlights become not turning off and
    it is a problem so
    I have to have my husband fix it relatively early. 
    
[/code]

I am confused by the `閉まらくなった`. I would understand if it were `閉まらなくなった`
(become not closing). I am not sure if this was just a typo by my professor or
whether it is some other structure.




"stopped closing properly"

Please disregard if we are done with this question.

