Ie 8 view mobile version!

I am using lastest mobile joomla.
I've upggraded IE6 to IE8. When visit my site, the mobile vers is showed.
I checked my hearder:
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; MathPlayer 2.10b; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; Alexa Toolbar; AskTB5.5)

Any help?
Thanks

This is an issue of current TeraWURFL database, will be fixed in next release.