When you test the CI in App designer, are you getting any error?
It could be a problem with the way you are assigning values using code.
I experienced weird behaviour with CI's w.r.t. PeopleCode execution and default values too.
If you're using a CI, all validations are executed on submitting it, so values are not necessarily the same in the CI fields as on screen. My guess is that the "FetchValue" you call, does not yet return the name you set, because it uses some obscure derived field that is populated on the page but not through your CI.
i am not get any idea can you explain what is the problem clearly i f you explain i try to rectify it.
PeopleSoft Technical Guru