Excel import problem (double-byte language)

I am from Taiwan. When I imported my data ( LedgerTable ) through Administration | Periodic | Data Export Import | Excel Spreadsheet | Template wizard, I found the texts in Chinese-Tranditional ( double byte ) are not displayed correctly. I found that there were three hidden rows in excel file the wizard created. The third column of first line is “en-us”. I guessed this might be the reason. If I am right, could anyone tell me how to import data corectly. Thanks. By the way, the texts directly keyed in are OK.