train from florence to rome

www.trenitalia.com
or competitor company
www.italotreno.it
Or you can get both companies’ schedules here (also recommended site, no added fees)
https://www.trainline.eu

Try the Italian spellings for the cities Firenze and Roma on trenitalia site. Otherwise try using trainline.eu site they have the same prices.

Be sure to put in the earliest time of day that you're interested in traveling, and it will also show all the rest of the times.

...i tried the trenitalia web site but ... obviously wrong any clues?..... Sometimes we are good at mind reading, but not this time. What went wrong? Give us a clue or there is no point in asking the question.

Trenitalia IS the correct web site. I second the comments from Frank, in that more information would be really helpful. For example, what dates are you travelling and what kind of problems are you having?