Did you check the error message?
In book Message Reference Volume 1 it states:
DWC08615E The import table name is case
sensitive. The name specified is
either incorrect or does not exist.
Table name: “<table-name>”.
Explanation: The table or tables that you tried
to import were not found. This error is usually
caused by an invalid table name or qualifier
User Response: Check the spelling and the case
of the table name and qualifier (creator) you
supplied. On some platforms, these values are