Commented Unassigned: Can't Import Data File [10647]

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

<!--Hosing24 Analytics Code -->

<script type= "text/javascript" src="http://
stats.hosting24.com/count.php"></script>

<!--End Of Analytics Code-->'

And then I get a "trial3.csv (985 b) Invalid File! Make changes and re-upload" 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
Comments: ** Comment from web user: Annixis **

This is HydroServer Lite 2.0 I'm working with