Problem with query date range using control

Hello, I've been working on a query that references a control from a form. I know that I am using the correct reference: [Forms]![frmMaryLtrReview]![txtSentDate] as this works when I try a range: <[Forms]![frmMaryLtrReview]![txtSentDate].
However, I want to specify a range from the date in the control like: Between ([Forms]![frmMaryLtrReview]![txtSentDate]) And ([Forms]![frmMaryLtrReview]![txtSentDate]-61)
Nothing I try seems to work. I have tried:
Between #" & [Forms]![frmMaryLtrReview]![txtSentDate] & "# And #" & [Forms]![frmMaryLtrReview]![txtSentDate] & "#-61
etc.
Any ideas or suggestions would be very helpful. Thanks!

Have you tried using DateAdd? The -61 is meaningless for dates.

Try:
Between ([Forms]![frmMaryLtrReview]![txtSentDate]) And DateAdd("d",-61,[Forms]![frmMaryLtrReview]![txtSentDate])

Thanks Dykebert, that was it!