My site has no "Similar pages"

[speedfly]

Hi,
I want to ask what mightbe the reason at my has not a Similar pages .
and my site is Working since one year and had 3 PR .
Thanks

[TheMadScientist]

You might get something out of this:

Importance of outbound links (if any), and does 'nofollow' matter? [webmasterworld.com]

See posts #4 & #5 Bewenched & tedster.