Error at Model.Save() in wpf application

Hello everyone..

I have developed an application using csla.In viewmodel class,I have called Model.Save().But I'm getting the following error at Model.Save() in Wpf application.

Error - The remote server returned an unexpected response: (413) Request Entity Too Large.

But the same Model.Save() works fine in Silverlight application.

What could be the possible reason?Please suggest.