Head Office having Cuberoam and we connect sophos to branch office connectivity not happen , other 3 branch office connectivity gone , after disconnecting the sophos other 3 BO is working , Kindly help what is the problem . we are in very critical situvat

Head Office having Cuberoam and we connect sophos to branch office  connectivity not happen , other 3 branch office connectivity gone , after disconnecting the sophos other 3 BO is working , Kindly help what is the problem . we are in very critical situvation