Did you run Setup after moving the site? It's necessary to correct all the paths.
Try these in order:
1. Manually delete all files in the core/cache directory, then clear your browser cache and cookies.
2. In PhpMyAdmin, edit the modx_system_settings table and set the value of compress_js and compress_css to 0.
If those don't work, the odds are that one or more files was corrupted in the transfer. It's fairly common if you use FTP to move them.
---------------------------------------------------------------------------------------------------------------
PLEASE, PLEASE specify the version of MODX you are using . . . PLEASE!
MODX info for everyone:
http://bobsguides.com/modx.html