My website is very very slow

hi
my website is http://www.alamatbisnis.com i host in my vps account
all website is running fast. only this website using directory press is running really really slow.
host in singapore but i’m in singapore to access the website itself it take 36 second to load the website base on https://tools.pingdom.com/
i only activate this plugins in my site
– akismet
– bbpress
– better wordpress google xml sitemaps
– contact form 7
– gzip ninja speed compression
– hcard widget
– NextScripts: Social Networks Auto-Poster
– Page speed
– Really Simple CSV importer
– wordpress seo

no slider nothing in my 1st page only 3 adsense and 1 logo. and small icon for facebook and twitter. really need help for this. thanks