When you fire it does it make any noise?
What might have happened is that you didn't dry the cleaned carto out and the wick got water in it. If you keep using it then the water will get 'used up' and e-liquid will take it's place and vapour should happen.
It's actually possible to carefully remove the wadding in a carto completely and just use the remaining coil as a dripper (it's not recommended to do this too much as the chances of breaking the coil are quite high) you could try taking the filler material out, as long as you have a spare cartirdge to play with that is) and carefully driping some e-liquid onto the coils to see if it vapes 'properly'
You might also have not put it back in quite right so now the juice in the filler can't get to the coil for it to turn into vaper, though I'd guess that it's probably just wet if it's heating up and there's e-liquid in there and no vapours being produced.