R help - Jun 2005 - question about SSOAP

Dear R folks:

I am trying to use SSOAP (version 0.2-2) package in R (version
2.1.0,linux) to access SOAP service on NCBI
(http://www.ncbi.nlm.nih.gov)

its WSDL file is at http://www.ncbi.nlm.nih.gov/entrez/eutils/soap/eutils.wsdl

but some errors occured:
> ncbi <-
processWSDL("http://www.ncbi.nlm.nih.gov/entrez/eutils/soap/eutils.wsdl")
> ff <- genSOAPClientInterface(ncbi at operations[[1]], def = ncbi, ncbi
at name, verbose=FALSE)
> ff at functions$run_eInfo("db=pubmed")
Error in toSOAPArray(obj, con, type = type) :
       no slot of name "elType" for this object of class
"SOAPVoidType"

what's wrong? I am looking foward to your help.

Thanks very much.

Tiger