I have all the techs and the lagoon, but when I pua a villager in to water the field it flashes watering the field for 1 sec and do researching!! EVERYBODY IN MY TRIBE JUST DO THIS!!!!! Can someone help? Thanks

And even the builders don't do it as well.

If they all go researching, that means you don't have all the 3rd level of technology. I think that the buiders have nothing special to build and the farmer are waiting for new crops so they all go researching! when the 3rd level of the 6 technologies are bought, it's the opposite: they want not to research! Look if you have not something else to reach!

I have all the teches.

Are you trying to water the "garden"? I mean the green patch with dead flowers, on the east of the village, above the strange rose.
If yes, you must select your villagers as "builders", put them on the patch and they'll water it with the water of the lagoon.

Thanks, it worked now!

Your welcome