I created an empty text file, with only those two entries in it, and it uploaded without any problems.
Can you open up your field notes in notepad, and verify the following:
1. There are no invalid lines (every line must start with a valid entry)
2. All the comments are just plain ASCII characters, and not too long
3. Just noticed this one with my testing : the VERY LAST LINE must not have a CR/LF at the end. If you're viewing this in notepad, do the following. Turn of word wrap (under Format->Word Wrap, no check mark there). Move your cursor to the very end. Press DOWN ARROW until it will not move any more, then press END. Your cursor should be at the end of the last field notes entry. If your mouse pointer is at en empty line, press BACKSPACE until you are at the end of your last field notes entry.