> Thanks, i should have mentioned i have tqtinterface installed before
> compiling arts but still get this error. I receive no error when building
> tqtinterface.

Hi again

Ok, it can be already installed but it is not found. You can realize this 
from the below command
"/opt/kde3/lib/qt3/bin/moc ./qiomanager_p.h qiomanager_p.moc"

For example this same command for Pardus Corporate 2 is
"usr/bin/tqt-moc /usr/qt/3/bin/moc ./qiomanager_p.h qiomanager_p.moc". 
You can try this command by hand giving absolute paths for tqt-moc and 
moc.

So now you should make some change in your makefile or acinclude file 
to find your tqt-moc executable's path.