I have built a simple test app which fails when I try to Publish it

Settings panel;
URL Prefix = http://localhost:8888/extjs 4/mobile/
Publish Path = /Users/mike/Desktop/Extjs4_builds/

terminal output shows this result;

/var/folders/rx/8cnpg2hj7415hzdsb1nsl8200000gn/T/temp.sh ; exit;
mike-mac-pro:~ mike$ /var/folders/rx/8cnpg2hj7415hzdsb1nsl8200000gn/T/temp.sh ; exit;
rsync -arvuz /Applications/MAMP/htdocs/ExtJS 4/mobile2/tabs2/ /Users/mike/Desktop/Extjs4_builds/ --exclude .svn --exclude .git --exclude .hg --exclude .DS_Store --exclude .cvs --exclude metadata --exclude project 1st.xds project2.xds --exclude .xds --exclude .architect --cvs-exclude
building file list ... done
ERROR: destination must be a directory when copying more than 1 file
rsync error: errors selecting input/output files, dirs (code 3) at /SourceCache/rsync/rsync-42/rsync/main.c(503) [receiver=2.6.9]
rsync: connection unexpectedly closed (8 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at /SourceCache/rsync/rsync-42/rsync/io.c(452) [sender=2.6.9]
logout


[Process completed]

please advise what could be incorrectly set
thanks
mike