You were flying the 06R localizer back course, not the 24L ILS. There's your issue.
Due to (afaik) DCS game limitations, the ILS for 24L is 110.15, not 110.1 as it is IRL. IRL the 06L and 24R ILS and the 06R and 24L ILS use the same frequencies, respectively, but in DCS the 24L/R localizers have .05 MHz added on.