Wasswa Bbosa has also agreed to take the head coach role on permanent basis.
"We are going to fight in the remaining games to survive. The fans should be calm," says Bamweyana.
The Red Eagles move to ninth spot while Maroons remain on the edge of the red zone.
"A senior player like him should not be making such silly mistakes," said KCCA coach Mike Mutebi of goalkeeper Charles Lukwago.
The race to the Uganda Premier League title remains tight after ten-man KCCA are held by Express FC at Lugogo.
The 10-time Cup winners bowed out of the competition 3-4 via a decisive penalty shootout against Maroons at Kavumba Recreation Centre.
Express hold a rich history in the competition, having won it 10 times - and are joint record-holders with KCCA.
The Red Eagles are 13th on the log on 21 points, one above the relegation zone. Bbosa believes they can survive the drop.
With just a point away from the drop zone, Express FC, who have only six wins to show in 20 outings, have 10 games to turn their fortunes around.
Express are not only 22 points behind leaders Vipers, but six above bottom side Proline.
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