Sugar has crashed

[doubleone]

Hi there,

My sugar site has crashed, it gives a funny error:

http://www.simplyrecruit.net/sugar/i...n&module=Users

Warning: main(modules/DynamicFields/DynamicField.php) [function.main]: failed to open stream: No such file or directory in /home/graylink/public_html/simplyrecruit.net/sugar/data/SugarBean.php on line 52

Fatal error: main() [function.require]: Failed opening required 'modules/DynamicFields/DynamicField.php' (include_path='/home/graylink/public_html/simplyrecruit.net/sugar/include/..:.:/usr/lib/php:/usr/local/lib/php') in /home/graylink/public_html/simplyrecruit.net/sugar/data/SugarBean.php on line 52



Can anyone point me in the right direction as to where I can start fixing?

[doubleone]

by the way - I have checked and all the files that supposedly "do not exist" do actually exist....