It'll be hard to pinpoint the issue based on info you provided.
There may have been a fault in the process you did or one of the ingredients was unsuitable (solvent?). It's also possible that the raw material (preferably powdered prior to extraction) you used had little DMT to start with. No one can really know...
If you can elaborate a little bit more then I'm sure someone will try to solve the puzzle.
Be inquisitive and always question things...