Up to version 2008, DirectRT has not supported some foreign characters like this. It has worked in some regions when the native version of Windows is used (e.g., are you using the Turkish version of Windows?). This question has come up before, e.g., please see also: http://www.empirisoft.com/support/showthread.php?t=1192

This issue may also be resolved in v2010, but not likely until an update sometime next year. The solution will involve allowing the use of native XLS files for input as opposed to the more limited .CSV file format.

Hope that helps,
Blair