Launceston coach Cliff Rainford says his players need to put their 56-11 hammering by Ampthill & District behind them as soon as possible.
The Cornish All Blacks took a 3-0 lead but Rainford said "it was downhill from there" as his side floundered.
"We played pretty well for five minutes and then we just didn't get in to the game," he told BBC Radio Cornwall.
"But you have to move on as quickly as possible. We'll have a good hard look at ourselves and put it behind us."
Launceston dropped to 13th in the National League Two South table after the heavy defeat.
"Once they got a couple of scores up we didn't take it on," added Rainford.
"At half-time we said we'd try to sort out things but it was just more of the same, to be honest.
"The disappointing thing is that our defence has been very good so to let 50 points in is frustrating - all the guys are frustrated and we've got a lot to work on in training.
"I think everybody is disappointed - to come all at way and lose like that is not acceptable."