Unable to update Device Expert from 5.8.5 to 5.9

Hi,

We can't upgrade Device Expert from 5.8.5 to 5.9. After we start ./UpdateManager.sh and browse ManageEngine_DeviceExpert_5850_to_5900.ppm, installation begins but fail with the message "java.io.IOException: /root/ManageEngine/DeviceExpert/pgsql/bin/mysqladmin: not found"

We are check:

[root@localhost DeviceExpert]# cd pgsql/
[root@localhost pgsql]# ls -al
total 16
drwxr-xr-x 4 root root 4096 Mar 21 10:55 .
drwxr-xr-x 28 root root 4096 Mar 21 10:50 ..
drwxr-xr-x 3 root root 4096 Dec 24 12:47 share
drwxr-xr-x 2 root root 4096 Mar 21 10:55 tmp

Device Expert 5.85 works fine and running on Linux, 2.6.32-279.14.1.el6.i686