急：看看这个错误？？？？
Warning: open(/tmp\sess_dba0272e97f3785f2b80297ea2ca056d, O_RDWR) failed: m (2) in C:\apache\htdocs\chat\check.php on line 34
Warning: open(/tmp\sess_dba0272e97f3785f2b80297ea2ca056d, O_RDWR) failed: m (2) in Unknown on line 0
Warning: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
我用的windows 下的php和mysql
但是出现了这个毛病，为什么啊？？？
高手来帮忙啊，我看到好多次了。
