(no subject)

Hi,
while running “rails server” , i get the error .
C:/Ruby192/lib/ruby/1.9.1/
rubygems.rb:762:in report_activate_error': Could not find Ruby Gem json (~> 1.4) (Gem::LoadError) from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:219:inactivate’
from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:254:in block in activate' from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:253:ineach’
from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:253:in activate' from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:254:inblock in
activate’
from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:253:in each' from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:253:inactivate’
from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:254:in block in activate' from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:253:ineach’
from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:253:in activate' from C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:1065:ingem’
from C:/Ruby192/bin/rails:18:in `’

Next , i gave command “gem install json” .so i get error

Building native extensions. This could take a while…
ERROR: Error installing json:
ERROR: Failed to build gem native extension.

C:/Ruby192/bin/ruby.exe extconf.rb
creating Makefile

make
gcc -I. -IC:/Ruby192/include/ruby-1.9.1/i386-mingw32
-I/C/Ruby192/include/ruby-1.9.1/ruby
/backward -I/C/Ruby192/include/ruby-1.9.1 -I. -O3 -g -Wextra
-Wno-unused-parameter -Wno
-parentheses -Wpointer-arith -Wwrite-strings
-Wno-missing-field-initializers -Wno-long-lo
ng -O3 -Wall -o parser.o -c parser.c
…/fbuffer/fbuffer.h:129:13: warning: ‘fbuffer_append_long’ defined but
not
used
…/fbuffer/fbuffer.h:136:17: warning: ‘fbuffer_dup’ defined but not used
…/fbuffer/fbuffer.h:149:14: warning: ‘fbuffer_to_s’ defined but not
used
…/fbuffer/fbuffer.h:90:13: warning: ‘fbuffer_append_str’ defined but
not
used
gcc -shared -s -o parser.so parser.o -L. -LC:/Ruby192/lib -L.
-LC:\Users\Luis\Projects
\oss\oneclick\rubyinstaller\sandbox\tk\lib
-LC:\Users\Luis\Projects\oss\onecli
ck\rubyinstaller\sandbox\tcl\lib
-LC:\Users\Luis\Projects\oss\oneclick\rubyinst
aller\sandbox\libyaml\lib
-LC:\Users\Luis\Projects\oss\oneclick\rubyinstaller\s
andbox\pdcurses\lib
-LC:\Users\Luis\Projects\oss\oneclick\rubyinstaller\sandbox
\openssl\lib
-LC:\Users\Luis\Projects\oss\oneclick\rubyinstaller\sandbox\zlib\l
ib
-LC:\Users\Luis\Projects\oss\oneclick\rubyinstaller\sandbox\iconv\lib
-LC:\U
sers\Luis\Projects\oss\oneclick\rubyinstaller\sandbox\gdbm\lib
-LC:\Users\Luis
\Projects\oss\oneclick\rubyinstaller\sandbox\libffi\lib
-Wl,–enable-auto-image-ba
se,–enable-auto-import parser-i386-mingw32.def -lmsvcrt-ruby191
-lshell32 -lws2_32
c:/rhostudio/devkit/mingw/bin/…/lib/gcc/mingw32/4.5.1/…/…/…/…/mingw32/bin/ld.exe:
ca
nnot find -lmsvcrt-ruby191
collect2: ld returned 1 exit status
make: *** [parser.so] Error 1

Gem files will remain installed in
C:/Ruby192/lib/ruby/gems/1.9.1/gems/json-1.6.5 for ins
pection.
Results logged to
C:/Ruby192/lib/ruby/gems/1.9.1/gems/json-1.6.5/ext/json/ext/parser/gem_
make.out

CAN ANYONE HELP ME???