How do i increase my website page rank? website based in Philadelphia usa, this website in wordpress, help me?

My website http://idealcustomsoftware.com its current page rank is 1. i did social bookmarking, i did high page rank link exchange, i did edu link exchange then after my website page rank is still 1. how much time its take to increase my page rank. if you seo guys have any suggestions then please help... show more My website http://idealcustomsoftware.com its current page rank is 1.
i did social bookmarking, i did high page rank link exchange, i did edu link exchange then after my website page rank is still 1. how much time its take to increase my page rank. if you seo guys have any suggestions then please help me.

domain age is 7 year old domain. i did lots of things then after my procedures cant help me.
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