judging by your past thread (
http://www.airbrushforum.org/threads/createx-transprent-paint.17440/#post-261279) I'm under the impression that you are using 'standard' createx... which isn't designed for illustration work, (or a CM brush) . it will clog rapidly in the smaller needle. It needs a .5 and your trying to push it through something half that size.
As has been said above, transparent base is a colorless paint, designed to dilute the colours, not thin the paint.
In order to make the paint thinner and more acceptable to the smaller needles you need a reducer, you mentioned you had some in your other thread so use that.
Change to the Illustration paint that you said you had, find a long thin skewer (the type they use for skewering meat) and stir the paint well, make sure you get all the mix at the bottom. then when you are done, use a piece of old stocking over the neck of the bottle and use that as a filter when you put it in the brush.
put your reducer in the cup, then add the paint, give it a good shake - with the lid on obviously, do a couple of test sprays to get things flowing. With your airflow at minimal pressure, do a test spray (close to the surface like you would do for Meow) and slowly bring up the pressure until its flowing well.
Hopefully you can get this sorted out and get going with Meow.