Problems after reboot

Hello,

I've had one site on my Linode (1 GB), it is wordpress site with classipress theme for ads. All was working fine. After I add another site, same wordpress with classipress, now both sites are not opening. After reboot, when I log in with Putty, I get this message:

System information disabled due to load higher than 8.0

After little time, the new site is only opening home page, but other pages are blank.

If you want to look it's old site http://malioglasi.co.rs and the second, new one http://www.malioglasibeograd.com

Is there anything I can do to make this two sites work, some optimization ?

Btw, in the second site I cant login in the wp admin area..