pf route-to slowdown

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Hello all.
I`m using only one pf rule to fool routing table.
All was good, but after upgrade from 6.3 to 7.1 i`ve discovered that it 
is not working anymore.
I`ve added: no state flags any to get it working again.
Now my list of rules is:
scrub in all
pass out on $if1 route-to ($if0 $if0gw) from $if0 to any no state flags any

Now my main problem is:
Using scp I can upload data from any host to server through $if0 but 
download is exetremly slow :-(
Does anybody have any suggestions ?