Combining iRules -> switch statements

I have a master iRule which is doing simple redirecting based on http::uri

I would like to add an additional set of rules that tries to do a string match for a specific URI typed in, such as:

http://events.oursite.com/Event.aspx?Event=someevent2010

I cannot, for the life of me, figure out how to integrate this rule into my existing rules, which look like so:

(sorry for the formatting, forums don't like http links)

when HTTP_REQUEST {
   set h [HTTP::host] 
   set u [HTTP::uri] 
   switch -glob $h { 
     "*somedomain1.*" 
     { 
       HTTP::redirect "https://somesite.com/EventOverview.aspx?Event=someevent1" 
      return
     }
    "*somedomain2.*" 
    { 
       HTTP::redirect "https://anothersite.com/EventOverview.aspx?Event=someevent2" 
       return
     } 
     "*somedomain3.*" 
    { 
       HTTP::redirect "http://oursite.com" 
       return
     } 
   } 
 }

I have tried the following, and for some reason it doesn't seem to catch it. Can anyone help me with this string match, string to lower problem?

when HTTP_REQUEST {
   set h [HTTP::host] 
   set u [HTTP::uri]
   switch -glob [string tolower [HTTP::uri]] {   
   "events.oursite.com/Event.aspx?Event=someevent2010" 
   {  
    HTTP::redirect "http://sub.domain.com/events/some-url-2010/home.aspx"  
    }
   } 
   switch -glob $h { 
    "*somedomain1.*" 
     { 
       HTTP::redirect "https://somesite.com/EventOverview.aspx?Event=someevent1" 
      return
     }
    "*somedomain2.*" 
    { 
       HTTP::redirect "https://anothersite.com/EventOverview.aspx?Event=someevent2" 
       return
    } 
    "*somedomain3.*" 
    { 
       HTTP::redirect "http://oursite.com" 
       return
     } 
   } 
 }