Adding websites with remote API is broken in 3.0.5.4p3 release.
See here for bugreport.
http://www.howtoforge.de/forum/entwicklerforum-15/
attached is the fixed file. It has to be copied in /usr/local/ispconfig/interface/lib/classes/
See here for bugreport.
http://www.howtoforge.de/forum/entwicklerforum-15/
attached is the fixed file. It has to be copied in /usr/local/ispconfig/interface/lib/classes/