I believe i am having a pollination problem

[superman]

I have flowers on my indoor hydroponic tomatoes but they don't seem to be pollinating i do occasionally give them a pretty hefty few shakes but they still don't seem to be going. The reason i am worried is i planted some plants outside (soil) as well but i planted them like prolly 3-4 weeks after my indoor hydroponic ones and they have tomatoes coming on them.

An suggestions for pollination would be helpful

thank you