sorry I never use acrobat on my Axim (I heard my friend said it's very slow) but I would suggest you try "RepliGo":
http://www.cerience.com/index.htm
It works as a Acrobat Writer in your system. you can print a document within Acrobat viewer as RepliGo format and sync it to your Axim, then use the viewer to read it...
the document is small and the viewer is optimized for PPC, you can zoom it, flow it and turn the whole document 90 degree for landscape viewing... I can't live without it.