Qt: Can't require 'qtwebview', and problems with SIGNALs

I can not call ‘qtwebview’, when you try to output:

C: /
Ruby186/lib/ruby/gems/1.8/gems/qtruby4-2.1.0-x86-mswin32/lib/QtWebKit.dll:
127: Can not find the specified procedure. - Init_QtWebKit (LoadError)
C: /
Ruby186/lib/ruby/gems/1.8/gems/qtruby4-2.1.0-x86-mswin32/lib/QtWebKit.dll
from C: /
Ruby186/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb: 31: in
`require ’
from C: / Users / nikolay / Documents / NetBeansProjects /
RssReader / lib / main.rb: 3

Аnd when trying to use the signal ListWidget itemclicked (), then writes
that is not found a signal. What should I do?