make sure you use ruby first:
rvm use ree-1.8.6-20090610
this is required when PATH get's modified after RVM was sourced and loaded ruby.
you can confirm that ruby is properly loaded by comparing beginning of PATH
with GEM_PATH
.
also make sure there are no extra settings for rubygems in ~/.gemrc
, rvm has a test for this:
rvm get head
and make sure to read the output - if there were any extra settings in ~/.gemrc
you should install all gems all over again.