Error when deploying updated widget

I'm trying to update a widget and deploy it out to our dev server.  I can get the widget running successfully on a local copy of the site, but when I copy it out to dev and register it, I get the following error: 

~~~\Widgets\CompletedReports_New\CompletedReports.ascx(16): error CS1061: 'ASP.widgets_completedreports_new_completedreports_ascx' does not contain a definition for 'RadGrid1_NeedDataSource' and no extension method 'RadGrid1_NeedDataSource' accepting a first argument of type 'ASP.widgets_completedreports_new_completedreports_ascx' could be found (are you missing a using directive or an assembly reference?)

Any ideas on what I can try?  Am I missing something?

Thanks!

Hello Zach,

Can you please refer to the following article where the same issue has been discussed and try the solutions suggested there.

In addition, can you please make sure that you have attached properly to the NeedDataSource event in the markup and in the code behind. Please also make sure that you have registered the Telerik.Web.UI namespace in the markup:

Hi Sabrie,

The issue was that I hadn't rebuilt the project out on the DEV server.  Once I did that, the widget loaded properly.  Thanks for your response!