3T6 driver costs less than 6$ and is awesome, see the 3T6modding or review thread for my current measurements of the manafont driver and how to add some current.
You can also post a picture of your driver, so that we can say how to improve it…
On a stock 3T6 the LEDs are parallel. dry driver has not the ability to work on 2 cells and a 3 cell 3T6 has weird handling.