Vista - Uri problem

Hi..
I have a problem with referencing resources.. I have two projects in my solution and from app2 i'm getting trough uri image which is included in app1 (app2 has reference to app1 ( i added it as reference to the app1 project) (for example <image Source="/app1;component/Image/pic.jpg"/>.. Both projects have changed output directories so they are built to the same dir.. Everything worked fine until i have changed the assembly name of app1.. than the designer is not able to generate view of app2 because the uri is invalid.. says that can't find the resouce.. but it's looking in bin\debug directory now instead of the directory which i set in outputpath prop for app1.. If i set the name of assembly back (so is equal to the name of the project) designer works again.. Any idea what's wrong?.. It works when it's compiled, but i'm wondering why the designer is not able to get the resources when the assembly name and project name are different..

Thanks