Trimming problem in Wilco/PA A320 Merge

I've been merging the PA planes with wilco panels for quite some time, but I'm unable to fully merge the A32x series because of a trimming problem, the aircraft requires a very high trim during landings in order to be able to flare. I've tried to search in your forum and other forums, but I don't seem to be able to find the solution. There's a solution saying that changing the following lines in the wilco aircraft.cfgempty_weight_CG_position=0.000, 0.000, 0.000to thisempty_weight_CG_position=0.63, 0.000, 0.000I tried that but the trim is still out of normal during landings, any ideas?