Albion take on AFC Wimbledon in their second match in Southern Group G, having been defeated by Leyton Orient a fortnight ago.
Tonight's game takes place at Crawley Town's People's Pension Stadium.
Robinson gives the Dons the lead midway through the first half, which they maintain going in at half-time.
Ruscrow converts from the penalty spot late on as the Dons take all three points.
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