In fairness, Carlton were clinical when they got anywhere near the danger area, particularly their crossing which was of the highest quality all afternoon.
United were down to the bare bones with Sean Wright and David Coyde both serving one match bans, Wright following his sending off at Stamford and Coyde for the accumulation of five bookings.
United started brightly and both Alex Troughton and Tom Garrick might have done bettter with two early chances but they shot themselves in the foot when Carlton scored with their first real attack in the 8th minute.
Manager, Terry Fleming was guilty of passing when he maybe should have cleared his lines and the resulting cross back into the box was headed home by Ruben Wiggins-Thomas.
It didn't shake United and we were having a reasonable share of posession but more careless defending in the 26th minue saw Ashley Grayson score.A ball on the right-hand side of United's box was only half cleared by Jack Cotton and when the cross came into our box it should have been cleared by Kallum Smith but his attempted clearance was blocked and fell to Grayson who made no mistake from close range.
United rallied two minutes later and a superb corner from Jack McGovern was only half cleared and as United kept the ball alive it fell to Stuart Reddington who rifled home.
In the 41st minute United should have got a boost when the games' best player to that point, Carlton's Adam Kimberley was substituted after picking up an injury.
It didn't work out that way as another piece of sloppy defending killed the game right on half-time.The ball was given away cheaply by Troughton up top and Carlton broke down the left, the perfect cross found Ian Brown unmarked to head home.
After the break United had a lot of the ball but tended to play across the pitch rather than forward and whilst we were neat and tidy we had no cutting edge, Carlton were always a threat despite not creating a great deal themselves.
Chris Funnell shot over with a crsip shot, as he had done just before half-time.
Week defending ended any hope United had in the 80th minute when Wiggins-Thomas was allowed to walk through United's rearguard and smash home.
We had a clear penalty appeal turned down when Troughton was tripped in the box but the game just drifted away.