I dont know if this will help you or not, but this is all I did and it worked.. I bought the servo sticks before xmas and just last night got around to automating them..
-Installed JoyTray from Ultimarc site
-Downloaded JoyChoose plugin from Mala site, unziped to Mala Plugins folder
-In Mala config (Event Plugins tab) select Joychoose, click Configure
-Path to select boxes both should be path to Joytray (mine is c:\program files\joytray\joytray.exe)
-Arguments should be -servo joy8way & -servo joy4way
-In Mala config (Mame Config - Additional) I have my path to Controls.ini
Hope this helped