URL needs to be in certain case letters

this is just one of examples.

 configuration

root@(ve11c)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.24.10:80
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        http { }
        tcp { }
    }
    rules {
        qux
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    vs-index 4
}
root@(ve11c)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm rule qux
ltm rule qux {
    when HTTP_REQUEST {
  switch -glob [HTTP::uri] {
    "/[wW]ebcenter/default" -
    "/WEBCENTER/default" {
       Do nothing
    }
    "/[wW][eE][bB][cC][eE][nN][tT][eE][rR]/default" {
      HTTP::redirect "http://[HTTP::host]/WebCenter/default"
    }
    default {
       Do nothing
    }
  }
}
}

 test

[root@ve11c:Active:In Sync] config  curl -I http://qweb.sys.com/webcenter/default
HTTP/1.1 404 Not Found
Date: Sun, 24 May 2015 14:18:07 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Sun, 09 Feb 2014 08:39:51 GMT
ETag: "41879c-59-2a9c23c0"
Accept-Ranges: bytes
Content-Length: 89
Content-Type: text/html; charset=UTF-8

[root@ve11c:Active:In Sync] config  curl -I http://qweb.sys.com/Webcenter/default
HTTP/1.1 404 Not Found
Date: Sun, 24 May 2015 14:18:13 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Sun, 09 Feb 2014 08:39:51 GMT
ETag: "41879c-59-2a9c23c0"
Accept-Ranges: bytes
Content-Length: 89
Content-Type: text/html; charset=UTF-8

[root@ve11c:Active:In Sync] config  curl -I http://qweb.sys.com/WEBCENTER/default
HTTP/1.1 404 Not Found
Date: Sun, 24 May 2015 14:18:32 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Sun, 09 Feb 2014 08:39:51 GMT
ETag: "41879c-59-2a9c23c0"
Accept-Ranges: bytes
Content-Length: 89
Content-Type: text/html; charset=UTF-8

[root@ve11c:Active:In Sync] config  curl -I http://qweb.sys.com/WeBcEnTeR/default
HTTP/1.0 302 Found
Location: http://qweb.sys.com/WebCenter/default
Server: BigIP
Connection: Keep-Alive
Content-Length: 0