Teamcity+Ubuntu+Mono2.10+msbuild == Unmet requirements

I've tried search for an asnwer to this but I've not made any progress.

I've installed teamcity 6.0.2 on an Ubuntu 10.10 server with mono 2.10.
I've set up some environment variables in the start up script:

#!/bin/sh

#

# /etc/init.d/teamcity -  startup script for teamcity

export JAVA_HOME=/usr/lib/jvm/default-java

export PATH=/opt/mono-2.10/bin:$PATH:$JAVA_HOME/bin

export PKG_CONFIG_PATH=/opt/mono-2.10/lib/pkgconfig

case $1 in

start)

/opt/teamcity/bin/runAll.sh start

;;

stop)

/opt/teamcity/bin/runAll.sh stop

;;

restart)

/opt/teamcity/bin/runAll.sh stop

/opt/teamcity/bin/runAll.sh start

;;

esac

exit 0