Hey WP,
What you can do is copy/paste in other tailwheel settings until one comes in right that works for your plane.
It might be better to email their group and see if they have a tune for this. Someone here might come forward with a fix they have already done.
If no one does, and they do not have a fix, I can walk you through how to try out different tailwheel settings. Its pretty easy. Thats if its a suspension problem. If it only needs to be raised up, then you just tinker around with the tailwheel height setting, which is found here in the 'aircraft.cfg' file in the D25A's main folder;
[contact_points]
point.0=1, -15.00, 0.00, -1.18, 1377.95, 0, 0.4100, 30.0, 0.4, 2.5, 0.6, 0.0, 0.0, 0.0, 0.0, 0.0
point.1=1, -0.05, -2.92, -4.1, 1968.50, 1, 1.1660, 0.0, 0.6, 2.5, 0.6, 0.0, 0.0, 2.0, 0.0, 0.0
point.2=1, -0.05, 2.92, -4.1, 1968.50, 2, 1.1660, 0.0, 0.6, 2.5, 0.6, 0.0, 0.0, 3.0, 0.0, 0.0
Note; Top is tail gear (center gear); next two are main gear. Red is height, and blue is suspension settings, which you can copy/paste in from other planes, (if its misbehaving). Use a similar type aircraft (weight and all) for its tailwheel settings.
To increase height, increase number value.
Note2; To open the config file, right click on it, select 'Open With' and select Windows Notepad.
Bill