TPT connection question

Connectivity
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TPT connection question

Hi,
I just install TPT and try to use TPT wizard to convert a Oracle table (through ODBC) to Teradata datasbase. During the steps to select the source, I can connect to the Oracle database and find the source table. However, when I try to get the columns from the table, it hangs, and the command windows says ... (unknown source) ... Is that I need to configure the program before I use?
Thx.