EXPORT TO MEMEORY ID: name sensitive?

Hi All.

I am using EXPORT/IMPORT TO/FROM MEMORY ID statement and I have the following problem:

During the EXPORT statement I have to use a field with exactly the same name as the field I used during the IMPORT statement.

This means that if I'm using a field with the same name the EXPORT fills it with expected values, but if I'm using a different name the field stayed empty and the SY-SUBRC=0.

Does any of you know what might cause this problem?

thanx.

ayal.