I have taskba3 running in two diferent machines, with Windows ME and Win XP, and it's working fine.
That's what I did:
TaskbarPositioning
TaskBarX $resolutionx-1158$
TaskBarY 0
TaskbarAlwaysOnTop
TaskbarWidth 1024
TaskbarHeight 24
TaskbarMaxTaskWidth 143
TaskbarBorder 2 2 2 2
TaskbarButtonBorder 2 2 2 2
TaskbarButtonTextBorder 20 0 0 0
TaskBarSpacing 3
TaskbarIconShow
TaskBarIconSize 14
TaskbarTextShow
TaskbarHorizontalTextAlign .left
TaskbarVerticalTextAlign .center
TaskbarButtonDirection .right
TaskbarNoSkinShift
TaskbarNoTextShift
TaskBarTButtonM .ontop
TaskBarRButtonDown !PopupTaskbar
TaskbarRefresh 100
TaskbarFlashScrollLock
TaskBarScrollFlash 500
TaskbarUseToolTips
TaskbarSkin taskbar.png
TaskButtonSkin tasks.png
TaskButtonSkinActive tasks.png
TaskButtonSkinMin tasks.png
TaskbarFont $font2$
TaskbarFontHeight $size5$
TaskbarActiveFont $font2$
TaskbarActiveFontHeight $size5$
TaskbarActiveFontBold
TaskbarMinFont $font2$
TaskbarMinFontHeight $size5$
TaskbarMinFontItalic
TaskbarText 000000
TaskbarTextActive 000000
TaskbarTextMin 000000
TaskbarTextFlash FFFFFF

Hope that help