wlc5760 web authentication custom page

[CSCO11256353]

I have installed custom web pages with our company logo on the autentication pages. 

everything is fine, users are able to access the pages and autenticate but the logo image is not showing.

instead of the logo *some text missing * is appearing on the webpage.

my logo file is .gif having a size of 211KB.

[Saurav Lodh]

Downloading a Customized Web Authentication Login Page

You can compress the page and image files used for displaying a web authentication login page into a.tar file for download to a controller. These files are known as the webauth bundle. The maximum allowed size of the files in their uncompressed state is 1 MB. When the .tar file is downloaded from a local TFTP server, it enters the controller's file system as an untarred file.