Deployed application but it seems that no models are loaded

i have a strange problem …
i successfully deployed my application and the mongrel cluster runs fine
… now on the application level i get the following error when i request
the app via the browser (it looks like not all files have been loaded
automatically, because also on a console i get the same error):

/var/lib/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:263:in
load_missing_constant' /var/lib/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:452:inconst_missing’
/var/www/quadratmeter/releases/20071210201141/app/views/layouts/default.rhtml:22:in
_run_rhtml_47var47www47quadratmeter47releases472007121020114147app47views47layouts47default46rhtml' /var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_view/base.rb:325:insend’
/var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_view/base.rb:325:in
compile_and_render_template' /var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_view/base.rb:301:inrender_template’
/var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_view/base.rb:260:in
render_file' /var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/layout.rb:254:inrender_without_benchmark’
/var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/benchmarking.rb:50:in
render' /usr/lib/ruby/1.8/benchmark.rb:293:inmeasure’
/var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/benchmarking.rb:50:in
render' /var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:1102:inperform_action_without_filters’
/var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:696:in
call_filters' /var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:688:inperform_action_without_benchmark’
/var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/benchmarking.rb:66:in
perform_action_without_rescue' /usr/lib/ruby/1.8/benchmark.rb:293:inmeasure’
/var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/benchmarking.rb:66:in
perform_action_without_rescue' /var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/rescue.rb:83:inperform_action’
/var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:435:in
send' /var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:435:inprocess_without_filters’
/var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:684:in
process_without_session_management_support' /var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/session_management.rb:114:inprocess’
/var/lib/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:334:in
process' /var/lib/gems/1.8/gems/rails-1.2.5/lib/dispatcher.rb:41:indispatch’
/var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel/rails.rb:76:in
process' /var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel/rails.rb:74:insynchronize’
/var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel/rails.rb:74:in
process' /var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel.rb:155:inprocess_client’
/var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel.rb:154:in each' /var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel.rb:154:inprocess_client’
/var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel.rb:281:in run' /var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel.rb:281:ininitialize’
/var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel.rb:281:in new' /var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel.rb:281:inrun’
/var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel.rb:264:in initialize' /var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel.rb:264:innew’
/var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel.rb:264:in run' /var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel/configurator.rb:282:inrun’
/var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel/configurator.rb:281:in
each' /var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel/configurator.rb:281:inrun’
/var/lib/gems/1.8/gems/mongrel-1.1.1/bin/mongrel_rails:128:in run' /var/lib/gems/1.8/gems/mongrel-1.1.1/lib/mongrel/command.rb:212:inrun’
/var/lib/gems/1.8/gems/mongrel-1.1.1/bin/mongrel_rails:281
/usr/bin/mongrel_rails:16:in `load’
/usr/bin/mongrel_rails:16

i have no clue…

sorry and the error is

uninitialized constant ActionView::Base::CompiledTemplates::Q2

Q2 is a class which lives in models …
all that stuff work fine on my dev machine