I have installed QT4.4.3 as you recommended in a different directory and its able to run well though the tools are scattered around , there is no action to dock them together.

The installation fails , but when i proceed as follows.

1.qmake qextserialport.pro

2.make

it gives an error that :

make: *** [build/obl/qextserialbase.o] Error1 .

I didnt make any changes to the qextserialport.pro , iam i missing something.