Slidershim is normally used to make controllers work with games that aren't CHUNITHM. Is there any reason you're trying to use it when you already have Brokenithm-Evolved working?
If you REALLY want to use slidershim with CHUNITHM, you'll need to set the output to one of the keyboard modes. This should be the segatools.ini settings for Keyboard 32-zone, Tasoller Layout
[io3]
; Test button virtual-key code. Default is the F1 key.
test=0x70
; Service button virtual-key code. Default is the F2 key.
service=0x71
; Keyboard button to increment coin counter. Default is the F3 key.
coin=0x72
; Set to 0 for enable separate ir control. Deafult is space key.
ir=0
[ir]
; Uncomment and complete the following sequence of settings to configure a
; custom ir-cappable controller if you have one.
ir1=0xBF
ir2=0xBE
ir3=0xDE
ir4=0xBA
ir5=0xDD
ir6=0xDB
[slider]
; Enable slider emulation. If you have real AC slider, set this to 0.
; Slider serial port must be COM1.
;enable=1
; Key bindings for each of the 32 touch cells. The default key map, depicted
; in left-to-right order, is as follows:
;
; SSSSDDDDFFFFGGGGHHHHJJJJKKKKLLLL
;
; Touch cells are numbered FROM RIGHT TO LEFT! starting from 1. This is in
; order to match the numbering used in the operator menu and service manual.
;
; Uncomment and complete the following sequence of settings to configure a
; custom high-precision touch strip controller if you have one.
cell32=0x41
cell31=0x31
cell30=0x5A
cell29=0x51
cell28=0x53
cell27=0x32
cell26=0x58
cell25=0x57
cell24=0x44
cell23=0x33
cell22=0x43
cell21=0x45
cell20=0x46
cell19=0x34
cell18=0x56
cell17=0x52
cell16=0x47
cell15=0x35
cell14=0x42
cell13=0x54
cell12=0x48
cell11=0x36
cell10=0x4E
cell9=0x59
cell8=0x4A
cell7=0x37
cell6=0x4D
cell5=0x55
cell4=0x4B
cell3=0x38
cell2=0xBC
cell1=0x49