I try to hit SPRs by varied PFR.... strange results @ NL25

[Sounded Simple]

After reading PNL Vol1 I decide to try hitting target SPRs with various hands.
In live games this works very well, raise 8bb preflop with AK - hey no problem.

Try it online to see what happens -
Every time I open raise 5,6 or 7bb preflop I get the blinds!

Im a bit lost, my live game has improved by changing this strategy (I play the equivilent of $2/$4 here) but I cant seem to get anyone at NL25 to go along with the plan!

How is everyone else finding it?