Crashed site - cache plugin

My Wordpress-powered blog has crashed after attempting to implement a caching plugin. The first time this occurred, I was able to change the .htaccess and plugin folder names and get in a delete/disable the plugins that caused the crash. This time, all my efforts have been to no avail. If anyone could get my site up and running ASAP it would be much appreciated. Please let me know if you require any additional information or have any questions. Error codes when site fails to load are as follows: Warning: require_once(/nfs/c07/h04/mnt/XXXXXX/domains/[login to view URL]) [function.require-once]: failed to open stream: No such file or directory in /nfs/c07/h04/mnt/XXXXXX/domains/[login to view URL] on line 392 Fatal error: require_once() [[login to view URL]]: Failed opening required '/nfs/c07/h04/mnt/XXXXXX/domains/[login to view URL]' (include_path='.:/usr/local/php-5.3.23/share/pear') in /nfs/c07/h04/mnt/XXXXXXXX/domains/[login to view URL] on line 392 I'd also be interested in hiring someone to correctly implement a caching system on my site, as well as security, CDN integration and backup functions, not to mention cleaning up any other issues that require technical expertise and know-how.