Gearbox select problem ldv maxus 09?

I have a 09 maxus the the gears git realluy hard esp 1st and 2nd only when running, iv put new clutch, pressure plate and realse bearing, to no avail, now changed the gear box and still the same problem in 1st and 2nd and changing gears are still hard,
Please any help would be much thanked,,,,,