tomatoe pants

does anyone know anything about tomatoe plants? i have one in a pot it produces flowers but no fruit. it is under 1-85w cfl. It produced some fruit when it first came inside.

[feed them and give the branch next to flower a thump it releases pollen keep the humidity down ,i have three outside covered in bloom with no fruit because of humidity

thanks I'll try that. no poblems with humidity house runs about 28%

thumping it worked got a few off the last flowers. any idea how long from flower to flower? and or what makes a tom plant flower?