.NET cast error in Connector

Hi,

I am working on a site where we are using some componentart controls. We have the following in the web config -> system.webServer -> Handlers

<add name="ComponentArtCallbackHandler" type="ComponentArt.Web.UI.CallbackHandler,ComponentArt.Web.UI" path="*.aspx" verb="*" />

I am getting an invalid cast exception: Unable to cast object of type 'ComponentArt.Web.UI.CallbackHandler' to type 'CKFinder.Connector.Connector' at line 41 in the CommandHandlerBase class.

protected Connector Connector
{
get
{
if ( _Connector == null )
_Connector = (Connector)HttpContext.Current.Handler;
return _Connector;
}
}

Any suggestions on how to get around this?

Thanks in advance.