BackgrounDRB on RubyStack

Hi All, was wondering if anyone has had any luck with using the BackgrounDRB (http://backgroundrb.rubyforge.org/) plugin on RunbyStack? I have followed the steps given on the plugins project page (see previous URL) and have not been able to get it to run.

I am currently getting the following errors in the backgroundrb log file:

/Applications/rubystack-1.4-beta-1/ruby/lib/ruby/gems/1.8/gems/packet-0.1.14/lib/packet/packet_master.rb:116:in `exec’: Exec format error – packet_worker_runner 7:6:log_worker:17:/Volumes/DATA/development/rails/sched/lib/workers:/Volumes/DATA/development/rails/sched/script/load_worker_env (Errno::ENOEXEC)
>> from /Applications/rubystack-1.4-beta-1/ruby/lib/ruby/gems/1.8/gems/packet-0.1.14/lib/packet/packet_master.rb:116:in `fork_and_load’
>> from /Applications/rubystack-1.4-beta-1/ruby/lib/ruby/gems/1.8/gems/packet-0.1.14/lib/packet/packet_master.rb:80:in `start_worker’
>> from /Volumes/DATA/development/rails/sched/vendor/plugins/backgroundrb/server/lib/master_proxy.rb:16:in `initialize’
>> from /Applications/rubystack-1.4-beta-1/ruby/lib/ruby/gems/1.8/gems/packet-0.1.14/lib/packet/packet_master.rb:19:in `run’
>> from /Volumes/DATA/development/rails/sched/vendor/plugins/backgroundrb/server/lib/master_proxy.rb:14:in `initialize’
>> from /Volumes/DATA/development/rails/sched/vendor/plugins/backgroundrb/lib/backgroundrb/bdrb_start_stop.rb:48:in `new’
>> from /Volumes/DATA/development/rails/sched/vendor/plugins/backgroundrb/lib/backgroundrb/bdrb_start_stop.rb:48:in `start’
>> from script/backgroundrb:35

Has anyone had any success with this plugin? Anyone know of a simple missing step to make it work? BTW: I have tried running it using a fresh install of both RubyStack 1.2.1 and the 1.4-beta1 on MacOSX. Any ideas would be greatly appreciated!

Thanks.