need help on reading comments in PoEdit


Hi all
I'm one of the Vietnamese translater of NVDA. I translate using poedit, and I know that we can press Ctrl+Shift+C to read the comment of a string to understand and translate it clearly, but when I press the hotkey, NVDA says could not find comment windows. Are there anything must be configured for using this feature?
Using NVDA 2018.4.2, already have portable NVDA 2019 alfa, poedit 2.2.1 (free version)
Any help would be appreciated
Dang Manh Cuong
 The Assistive technology specialist
 Sao Mai Vocational and assistive center for the blind
52/22 Huynh Thien Loc St., Hoa Thanh ward, Tan Phu dist., HCM, Vietnam.
 Tel: +8428 7302-4488
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 Twitter: @ManhCuongTech
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