Plesk Cant Update Itselt

[sosbilisim]

Hello;

My Plesk server cannot update itself. My plesk version is psa v8.6.0_build86080930.03 os_CentOS 5 (x64) but i cant see update list in build080710.09 (update-5).

I get the plesk's website parallels_installer_v3.3.2_build080710.09_os_CentO S_5_x86_64 and run but it said currently installed. How can I install new version my system?

How can I resolve this update problem ?

Thanx
Muharrem