"@import url" command make CssParser::RemoteFileError: CssParser::RemoteFileError #46

strings at begin of css file

@import url(http://fonts.googleapis.com/css?family=Abel|Allura);
@import url(http://fonts.googleapis.com/css?family=Oswald:400,300);

versions:
ruby 2.0.0p195 (2013-05-14 revision 40734) [x86_64-linux]
css_parser (1.3.4)

irb(main):013:0> incss = CssParser::Parser.new
=> #false, :import=>true, :io_exceptions=>true}, @rules=[], @loaded_uris=[], @blocks=[], @folded_declaration_cache={}, @css_source="", @css_rules=[], @css_warnings=[]>

irb(main):014:0> incss.load_uri! '/tmp/040523868533654style.css'
CssParser::RemoteFileError: CssParser::RemoteFileError
  from /home/user/.gem/ruby/2.0.0/gems/css_parser-1.3.4/lib/css_parser/parser.rb:470:in `rescue in read_remote_file'
  from /home/user/.gem/ruby/2.0.0/gems/css_parser-1.3.4/lib/css_parser/parser.rb:423:in `read_remote_file'
  from /home/user/.gem/ruby/2.0.0/gems/css_parser-1.3.4/lib/css_parser/parser.rb:354:in `load_uri!'
  from /home/user/.gem/ruby/2.0.0/gems/css_parser-1.3.4/lib/css_parser/parser.rb:138:in `block in add_block!'
  from /home/user/.gem/ruby/2.0.0/gems/css_parser-1.3.4/lib/css_parser/parser.rb:122:in `each'
  from /home/user/.gem/ruby/2.0.0/gems/css_parser-1.3.4/lib/css_parser/parser.rb:122:in `add_block!'
  from /home/user/.gem/ruby/2.0.0/gems/css_parser-1.3.4/lib/css_parser/parser.rb:356:in `load_uri!'
  from (irb):14
  from /usr/bin/irb:12:in `'