Can some one help me please.

[insanewhip]

While uploading files into my forum root. (use godaddy) I deleted something(dont no what) that shut my whole site down. This is the error

Warning: require(./includes/class_bootstrap.php) [function.require]: failed to open stream: No such file or directory in /home/content/i/n/s/insanewhips/html/global.php on line 15

Fatal error: require() [function.require]: Failed opening required './includes/class_bootstrap.php' (include_path='.:/usr/local/php5/lib/php') in /home/content/i/n/s/insanewhips/html/global.php on line 15

Any ideas? Can i get it back with out any issues? Or should i give it up?