[ESS] no S4 help under Windows XP

[Ross Boylan]

I installed Goulet's package awhile ago, and am running ESS 5.3.10,
emacs 22.3.1 and R 2.8.1.  I started an R session with M-X R.  I don't
think I've made any customizations to R/ESS.

?setClass
or 
?Classes
gets me an empty buffer *help[R](setClass)*.

Could anyone suggest a solution or diagnosis?  (Well, other than my
short-term fix of working in Linux--the data I'll need is on Windows and
needs to stay there).

?sum (for example) pops open a windows help browser, open on the
approprirate function.  That browser only shows the contents of one
package (base in that case).

library(help=methods) gets the expected help in the R session (i.e., in
the same window as the one in which I typed the command).

search() shows methods on the path.

I launched emacs by dragging a .R file onto the emacs icon on my
desktop.

Thanks.
Ross Boylan