Appiah opened the scoring in the 31st minute to take his tally to four goals in 11 games.
But the away side bounced back to secure a 3-1 win on Tuesday night.
The Reds had to pay the price after Ashley Nadesan's red card in the 43rd minute for a second bookable offence.
On Saturday, Crawley will face a trip to the bottom of the table side, Scunthorpe United, as they look to bounce back from back-to-back defeats.
Appiah joined them in the summer as a free agent after he brought to an end his spell in India. Read Full Story
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