for help:IDE errors

when i built the project copied from the cd of de2 board, i met the following error:

A build error occured

Reson:'Device Driver [Sopc_Builder]/altera_avalon_uart/sdk_arm/lib':Spaces in filenames/paths are not supported.The affected file must be moved or changed.

i check the filenames and path,but i find no space in the filename or path in kits/nios/components/altera_avalon_uart/sdk_arm/lib

and i try to do as the tutorial information,delete the file,and then another error occure,similar to the former

how can i resolve this problem?