I am confused - are you developing in xhtml or wml? They are not the same.
WML does not support refreshing or redirects (client or server), but xhtml mobile profile supports it in the same way as (x)html
content="15; url=(http://www.example.com/new.html" />
I have tried the code you posted in my browesr, only changing the url to another site (http://www.clicksave.co.nz) and it works fine - after 5 seconds it redirects to the page/site specified in the meta tag.
What browser / device are you tryiong to get this to work in?
Since Nokia XHTML Browser do not support the http-equiv attributes of meta tags,
I tried to achieve the same thing via HTTP-Header directives set by my JSP Page.
I need this for an animation, which was simply in WML by using the event handlers.
How I read the specifications the following Header Information should cause a redirect after 5 Seconds: