Try this: turn tracking on, and take a 30 second Preview image of stars. Then turn tracking off, and do the same.
Question: are the lengths of the star trails with tracking turned off shorter, longer, or the same as with tracking turned on?
If the length of the star trails are the same, your OTA is not moving (see my previous comment about using a bubble level). Check to make sure the RA axis is locked, and there is nothing keeping the OTA from moving -- balancing, cables, etc). Or, ASIAIR did not implement your mount correctly -- you did not mention what mount you are having a problem with.
If the trails are shorter with tracking turned on, but still not pinpoint stars, again it could be unlocked clutches or cables caught in something, or it could also be a case where either polar alignment is off, or your mount is not tracking at the sidereal rate -- try a digital inclinometer (they are pretty cheap $20 items at Amazon nowadays) to check how fast the mount's RA axis is rotating. At sidereal rate, it should be rotating at 15.04 arc seconds per second of time (or 15.04 arc minutes per minute of time, or 15.04 degrees per hour of time).
If the star trails are actually longer with tracking turned on, the RA axis is facing the wrong way (the axis is facing south in the northern hemisphere).
In short: stars move at 15.04º per hour, from east to west. As long as the RA axis is pointed near the pole, the east-west direction should be correct. If the mount is not tracking at Sidereal rate (15.04º per hour), the trails will exist but are shorter. If the mount is not moving at all, then stars will trail for 15.04 arc second per second of exposure time.
A request: it is rather difficult for me to parse your postings that has no punctuations nor capitalizations-- English is not my first language, and after 55 years living in the USA, I still have problems reading English. Using punctuations will help the rest of us understand what you are saying. Right now, I am just guessing what you mean.
Chen