How to solve theme related error in web application....????

Question

Theme 'ThemeGlobal' cannot be found in the application or global theme directories. In web.config file

 

<pages theme="ThemeGlobal">

<controls>

<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />

<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />

</controls>

</pages>