[CentOS] MySQL Can't create file '/tmp/#sql2e0_98_0.frm' (errno: 9) problem

Hi.

I have a strange problem.

I installed cacti, and set it up.

When I click on the Plugins Management, I noticed Error
"FATAL: Database or Table does not exist"

Further testing revealed that at the moment MySQL can not create 
temporary files in /tmp. It is same for ANY database!

SELinux is disabled.
I logged to mysql as root and error is same.

Command used is:
CREATE TEMPORARY TABLE IF NOT EXISTS plugin_temp_table LIKE bak_menu;


Error is:
ERROR 1004 (HY000): Can't create file '/tmp/#sql21f8_f3_0.frm' (errno: 9)

What could be the problem, any idea how to proceed?

I do not think I edited any MySQL setting.

-- 
Ljubomir Ljubojevic
(Love is in the Air)
PL Computers
Serbia, Europe

StarOS, Mikrotik and CentOS/RHEL/Linux consultant