i have a problem with import language to drupal please see the error message give me some advice thank you.

warning: fopen() [function.fopen]: Unable to access C:\WINDOWS\TEMP\tmp21A4.tmp in d:\clientweb\tradesignal\wwwroot\drupal\includes\locale.inc on line 516.
warning: fopen(C:\WINDOWS\TEMP\tmp21A4.tmp) [function.fopen]: failed to open stream: No error in d:\clientweb\tradesignal\wwwroot\drupal\includes\locale.inc on line 516.
The translation import failed, because the file zh-hans.po could not be read.
The translation import of zh-hans.po failed.

thank you.