PHP 4.2.2 & Apache 2.0.39 => non-numeric argument

Hi! i have AIX 4.3.3, Apache 2.0.39, gcc-2.9-020209 both rpm installed from AIX Toolbox, (they had php also but v4.0.6 and that said "Exec format error"). And now i'm trying to install the "php4-STABLE-latest", In the manual i read that i should probably do a "./configure --with-mysql --with-apxs=/www/bin/apxs" but since i have Apache 2 i guess it would be "./configure --with-mysql --with-apxs2=/www/bin/apxs" right?, it's the first time i install php btw ;-).. but i get this error message: checking for Apache 2.0 module support via DSO through APXS... expr: non-numeric argument what can be wrong?, i haven't found anyone with a similar problem, so i figure i should ask here, Anyone have any tips?