RB1100ahX2 CANT GET MORE 10 OR 20 MB PORT 11-12-13

i would like to know i upgraded from a 493ah i even enter all the config by hand without any backups and im having problem to get a close performance that i had had with my 493ah sometime i get 30 down 70 up and sometime nothing im connected to my isp on 100mb connection is ther something i have to do im confuse now because i had to put my rb493ah for now can someone help me

thanks