Redirect link is not working

index.rhtml
<%= form_tag %>
select category : <%= select ‘treatmentphase’, ‘cats’ ,
Treatmentcategories.find(:all).collect {|l|[l.name, l.id ]}%>

phase : <%= text_field ‘treatmentphase’, ‘phase’%>

Comments : <%= text_area ‘treatmentphase’,‘comments’%>
<%= submit_to_remote ‘button’, ‘Save’, :url => {:action =>
‘savephase’} %>
<%= submit_to_remote ‘button’, ‘Save & More’, :url => {:action =>
‘saveandmore’} %>
<%= end_form_tag%>

controler:

def savephase #used to save the pahse item
@treatmentphase = Treatmentphases.new()
@treatmentphase.name = params[:treatmentphase][‘phase’]
@treatmentphase.description = params[:treatmentphase]
[‘comments’]
@treatmentphase.treatmentcategory_id = params[:treatmentphase]
[‘cats’]
@treatmentphase.user_id = session[:user]
if @treatmentphase.save

      redirect_to  :controller => 'treatmentcategories',:action =>

‘index’
else
render :action => ‘savephase’
end
end

it is saving the data but not redirecting to the controller. any
suggestions?