hm... replaced it like you said for all the pots, still same thing Serial.write isnt triggered... 
Also i got this from the reference site
Warning
Because of the way the abs() function is implemented, avoid using other functions inside the brackets, it may lead to incorrect results.
abs(a++);Â // avoid this - yields incorrect results
a++;Â Â Â Â Â // use this instead -
abs(a);Â Â Â // keep other math outside the function
How do i make it like this?