Error in download.KEGG.Path(spec

Reading KEGG annotation online:

fail to download KEGG data...
Error in download.KEGG.Path(species) : 
  'species' should be one of organisms listed in 'http://www.genome.jp/kegg/catalog/org_list.html'...
In addition: Warning message:
In utils::download.file(url, quiet = quiet, method = "libcurl",  :
  URL 'http://rest.kegg.jp/link/mmu/pathway': status was 'Failure when receiving data from the peer'

网速不行