Strage characters in "ofline messages"

[johnme]

Hi

I'm using elastix 2 64bit, openfire 3.5.1.3, and spark the latest.

When everybody is online everything is fine, but if i send a message in Greek language to an offline member then when he login he receives strange characters like "???????? ????" instead of the message.
If i type in English everything works fine for offline users.

Is there a solution for this?

Thanks
John