asp:TabContainer not styled after deployment, then just fixes itself?

I have an asp:TabContainer on a form and after the app is re-deployed to the server, the tabs aren't styled. If I take the Webresource.axd URL and try to load it in the browser, I get a redirect to a login page, so it seems like an authentication problem, yet the rest of the app has already been logged in long before you get to the page with the tab control.

A restart开发者_StackOverflow中文版 of the web server and even a reboot don't appear to affect it.

Then, eventually the styles start working and do not stop working until another deployment, when it usually exhibits the same behavior.

Is there some kind of caching or permissions issue going on?

Here's the authentication from the web.config:

<authentication mode="Forms">
    <forms name=".ASPXAUTH" protection="All" timeout="2400" loginUrl="Default.htm"/>
</authentication>

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The Problem is protection level(ALL). Make it CSS files are available to non protected pages.

<location path="cssname.css">
    <system.web>
      <authorization>
         <allow users="*"/>
       </authorization>
     </system.web>
</location>

Learn More about Setting authorization rules for a particular page or folder in web.config

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if u have changes the cssclass of the tab container, it will look like this.. if u want to completely change the look of tabcontainer u have to include the entire css of the tab container

.tab
{
    margin:5px 0px 5px 0px;    
}

.tab .ajax__tab_header
{
    font-family: arial,helvetica,clean,sans-serif;
    font-size: small;
    border-bottom: solid 5px #00B3B2;
    padding-left: 50px;
}
.tab .ajax__tab_header .ajax__tab_outer
{
    background: url(../Images/sprite.png) #d8d8d8 repeat-x;
    margin: 0px 0.16em 0px 0px;
    padding: 1px 0px 1px 0px;
    vertical-align: bottom;
    border: solid 1px #a3a3a3;
    border-bottom-width: 0px;
    border-radius: 5px 5px 0px 0px;
}
.tab .ajax__tab_header .ajax__tab_tab
{
    color: #000;
    padding: 0.35em 0.75em;
    margin-right: 0.01em;
}
.tab .ajax__tab_hover .ajax__tab_outer
{
    background: url(../Images/sprite.png) #bfdaff repeat-x left -1300px;
    cursor: pointer;
}
.tab .ajax__tab_active .ajax__tab_tab
{
    color: #fff;
}
.tab .ajax__tab_active .ajax__tab_outer
{
    background: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAADICAYAAAAp8ov1AAAAAXNSR0IArs4c6QAAAAZiS0dEAAAAAAAA+UO7fwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9oJGA41KpTYroIAAACASURBVCjP7ZE7DsJADESfJiL37znNXoJLUNARa7Ni6Bw5AtFEqXAx8vj/wfZNwBBAakPAWukQEJUu1RGVLt9su4yo9eJ3t0FrDWyTg58HezlujFPE9lXAQ8BdQM93R9LtM2ve/vnB22tcF/DaTpItJwHKVWcBk4BLwlw1/nAUvAGm30u0udPq+QAAAABJRU5ErkJggg==") #00B3B2 repeat-x left -100px;
}
.tab .ajax__tab_body
{
    font-family: verdana,tahoma,helvetica;
    font-size: 10pt;
    padding: 0.25em 0.5em;
    border: solid 1px #00B3B2;
    border-bottom:0px;
    border-right:0px;
    border-top-width: 0px;
}

now just include the cssclass for the tab container