Can't Import Data File

Annixis[CodePlex]
I am trying to import a test CSV file. It looks just like the sample CSV format, but when I go to upload a box pops up saying:

'The page at www.(myserver).net says:

true
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And then I get a quottrial3.csv (985 b) Invalid File! Make changes and re-uploadquot message above the input box. What's wrong??

This is the top 3 rows of my CSV file, it looks just like the sample so I don't understand the problem:

LocalDateTime,DataValue
2012-04-01 00:00:00,17
2012-04-01 00:10:00,17

Start by reproducing the upload with the provided three-row CSV and inspect the data-file validation path. Compare the file with the sample CSV and trace the source of the unexpected alert text and “Invalid File!” message; done means the valid CSV is accepted or the required format is clearly identified.

Written by the indexing model from the issue text.