Before uninstalling the module you must unistall the hack. The hack inserts some conde in your default.asp.vb
before making those changes, DSLocalizator copies the default.asp.vb and adds the date and time to the filename inclusind a .resources extension
so, you must do the following:
1) Make a backup of your DNN folder
2) Restore the original default.aspx.vb
After that you can unistall the module by using the HOST - Module definitions
Hope it helps
Note: Please try to see your DNN error log to see if there is some informaton about what the problem was.