GetMachineStoreForApplication error

[billsahiker]

I get the following error when I try to call
GetMachineStoreForApplication:
Unable to determine application identity of the caller.

msdn indicates this method requires evidence, but how to supply the
evidence?

I am able to use GetMachineStoreForAssembly, but that does not serve
my need which is to create a storeage file in one assembly and read it
from another assembly in the same application.

I used the IsolatedStorageFilePermission(PermissionState.Unrestricted)
and checked to make sure it was successful.

Any suggestions?

Bill