hi all, i'm using windows xp sp2, and installed ruby through ruby 1.9 one click installer. then when i try to using ri, i get the following response, can anyone help me with my problem? great thanks.

C:\Documents and Settings\eyang>ruby --version
ruby 1.9.1p243 (2009-07-16 revision 24175) [i386-mingw32]

C:\Documents and Settings\eyang>ri --version
ri 2.2.2

C:\Documents and Settings\eyang>ri String
Updating class cache with 0 classes...
Nothing known about String

C:\Documents and Settings\eyang>ri
Updating class cache with 0 classes...
No ri data found

If you've installed Ruby yourself, you need to generate documentation using:

  make install-doc

from the same place you ran `make` to build ruby.

If you installed Ruby from a packaging system, then you may need to
install an additional package, or ask the packager to enable ri generation.

C:\Documents and Settings\eyang>

by the way, when i try to use gem, i got the following error messages too, anyone can explain it ? great thanks.

C:\Documents and Settings\eyang>gem --version
1.3.5

C:\Documents and Settings\eyang>gem query --remote

*** REMOTE GEMS ***

ERROR:  While executing gem ... (Errno::ENOMEM)
    Not enough space - <STDOUT>

C:\Documents and Settings\eyang>