Redirects for old site - iRule Newbie needs help

  
  when HTTP_REQUEST {    
    if {[string tolower [HTTP::host]] eq "oldsite.com" } {    
     switch -glob [HTTP::uri] {    
       "/" {    
        log local0. "redirect on empty URI"    
        HTTP::redirect "http://newsite.org/scrubs/imagine "    
    }    
       default {    
       set base [URI::basename [HTTP::uri]]  
       log local0. "This is the base variable $base"  
       set sbase [split $base .]  
       log local0. "this is the base split by the . : $sbase"  
       set itemn [lindex $sbase 0]  
        log local0. "redirect on itemnumber without the extension: $itemn"    
        HTTP::redirect "http://newsite.org/scrubs/imagine/$itemn.aspx"    
                          }    
     }    
    }    
   }