Two second-half errors proved costly for Longford Town as Shamrock Rovers advanced to the next stage of the FAI Ford Cup.
After dominating the first half, Town fell behind nine minutes after the break as Rovers broke the deadlock against the run of play: Neale Fenn's effort came off the bar, Gary Twigg hooked it back and Town defender Chris Deans headed into his own net.
They doubled their advantage in the 71st minute when Billy Dennehy's free-kick from the edge of the box slipped through the hands of Town keeper Aaron Shanahan.
Town, though, didn't give up the fight and pulled a goal back in the 79th minute when, in a crowded box, John Lester got to the end of Mark Salmon's cross to toe-poke home.
Rovers were unconvincing as First Division Town really put it up to their illustrious opponents and deserved more.
In the 34th minute, Town had calls for a penalty turned down after Hynes' 25-yard shot seemed to hit the arm of Aiden Price.
As half-time approached, the home side pressed for the opener. Mark Salmon capitalised on a mistake by Chris Turner, broke down to the end-line and crossed into the box for Hynes, but Price blocked his effort.
GALWAY UNITED will face another FAI Cup derby battle with their local rivals Salthill United after last night's 1-1 draw at Terryland Park.
A poor second half came to life In the 83rd minute when Galway substitute Jason Molloy headed home Karl Sheppard's cross.
However, Salthill summoned an instant response when Ciprian Straut headed in an equaliser from close range from Michael Quirke's cross.
Mike Quirke's free kick had caused panic in the Galway defence and Straut got his head to the ball from close range as Salthill eked out an unlikely draw.