Visual Studio and expression blend error

Question

I am working on a WPF project ...the project work fine in both visual studio and expression blend. Now I have change the project structure by moving the projects in folders. Now application working fine visual studio but when I open application in expression blend and If in expression blend I do not make any change the project works fine but If I make any change in project using expression blend I gives error .......Some send report or Do not send  to microsoft.....