Chances are very less that you'll get a college with your DU JAT rank. Combining all the colleges accepting DU JAT scores the total number of seats available are 1162 this year.

Moreover even if seats remain vacant in any college not many students will get an opportunity to get admission. 

But you can certainly try for next year because if you managed to get 64% this year you'll certainly perform well next year. 

All the very best