Yes, the wheel does not work in this old Motif program... IMHO, imwheel is a bad solution as it interferes with your normal mouse behaviour. Either use xpdf or live with the fact you won't have wheely bits until Adobe release a more modern version of Acrobat!
I run the full Adobe writter software using Win4Lin/Win95 on my Linux desktop. Works a treat.
I often print to the Adobe printer and it generates postscript files that I then email from Linux.