Was this on Stars or Full Tilt? Many sites don't write the summary information for their MTT's so they have to be edited manually so HM can know the finish position and prizes.
If you play at Pokerstars, you need to request and import any/all your tournament histories and import those to HM. Stars does not write the tourney summaries to your hard drive, like FTP does.
Email
support@pokerstars.com and ask for ALL your old Hand Histories and Tournament Summaries.
Then later, you want to import the summaries on a regular basis:
Pokerstars > Lobby > Requests > Tournament History .. > 200
Then you have to create a text file, from the email, to import to HM.
http://www.holdemmanager.net/faq/afm....aspx?faqid=43