Roisin Molloy scored from the spot for the midlanders.
Athlone Town were unable to start their season with a trophy as they fell to a 2-1 defeat to Shelboune in the President's Cup over the weekend.
Two goals in the first half from the Dublin side proved the difference with Roisin Molloy halving the deficit from the spot for the midlanders in the 74th minute.
Colin Fortune's side start their defense of the Premier Division title this weekend as they host Wexford youths on Saturday.
Meanwhile, the men's team had to settle with a 1-1 draw with Longford Town, they'll be looking to pick up their first win of the season as they also face Wexford on Friday night in Ferrycarrig Park.
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