AFC Telford moved six points clear of the Blue Square Bet Premier relegation zone with a win over a Forest Green side who played 72 minutes with 10 men.
Chris Sharp headed the Bucks ahead when he converted from Will Salmon's right-wing cross after only eight minutes.
Rovers then had Chris Todd sent off for foul and abusive language after an altercation with Marlon Jackson.
Sharp added a second with a shot from six yards and he, Jackson and Jonathan Brown all missed further chances.
Forest Green winger James Norwood received a second yellow card for his part in a last minute fracas after he had already been substituted.
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Forest Green Rovers manager Dave Hockaday told BBC Gloucestershire:
"There were a few of the boys not quite at it mentally tonight.
"I'm disappointed we didn't get something in the second half as we deserved it but the first half we shot ourselves in the foot.
"It was a poor challenge (by Chris Todd) and it was a red card. He's let everybody down.
"You can't make those challenges in the modern game and as soon as he did it we thought 'red'."
AFC Telford United 01 Young 02 Salmon 06 Killock 18 Blackburn 23 Valentine 08 Trainer 20 Davies (Smith - 86' ) 09 Perry Booked (Proudlock - 69' ) 19 Jackson 22 Brown 25 Sharp (Cain - 90' Booked ) Substitutes 32 Robinson 17 Clough 27 Smith 28 Cain 31 Proudlock Forest Green Rovers 30 Russell 02 Hodgkiss 03 Stokes Booked 05 Turley 06 Todd Dismissed 08 Klukowski 11 Forbes (Henderson - 62' ) 28 J Collins 07 Norwood (Styche - 81' ) 14 Taylor (Graham - 45' ) 23 Uwezu Substitutes 16 Graham 04 Pook 09 Styche 24 Henderson 29 T Wright
Ref: Jeremy Simpson