rouncube can't compose and reply to emails

[scuarecircle]

0:)
I got a virtual server machine, which has a mail server somewhat like this :

mx.myvirtual.com

It uses postfix and dovecot for e mails, the os is debian 6 and roundcube was installed from apt. I know, older version, but the new one acts weird, so this one worked without issues, till this change was made.
For some reason, i needed the myvirtual.com domain and had to change mx.myvirtual.com to mx.yourvirtual.com. I made the changes in postfix /etc/postfix/main.cf, switching the names and in /etc/hostname and /etc/hosts also and now I can see and receive the emails (in roundcube) but can't compose or send, or reply to them. When I try to hit compose in roundcube, it does nothing and when I try to reply to an email, it returns me this error : Message has not been sent. Do you want to discard your message?

I can send emails from postfix, using webmin or telnet, just roundcube has some problems in doing that. The firewall is down and everything should be OK by my... calculations !
I guess it's a permission problem, but don't know what files needed permission and why ?!
Or maybe something in the database needs to be changed, after I changed the address of the mailserver from mx.mydomain.com to mx.yourdomain.com ?
I'm missing something here :confused:,
I searched the entire Internet, corner to corner, including porn and found no answer to this !
Please help !

[scuarecircle]

Hold on people !

I figured out, what it was and well...I have to tell this so no other idiot like me wonders why the buttons won't work in roundcube, all of a sudden !

A few days back, I customized the logo and enlarged it so it covered the first two buttons in roundcube, that is send and compose ! Yes...is just thought the z-index is smaller than that of the buttons, on the interface but it isn't ! The logo was an invisible png where it covered the buttons so they didn't worked anymore.......yes great, i forgot to make the image smaller ! I lost a few hours to this idiocy !
Beware when you change the logos or customize the interface and don't ever forget about that ! Either change the z-indez of the logo container, make it lower that that of the buttons, or enlarge the header.
I purged mysql...roundcube-core a few times, portgresql....hell, searching through logs..nothing.only to find out that it sends emails, by the button down the page...yeee !
It had nothing to do with mailserver name change, just a coincidence that made me think is something wrong with the settings.

I'm genius !