I cant get my splits down!! Help?

Im a cheerleader ive bene practicing my splits for like a year and they are not down!!!! mOst of my friends who practice them get them in like 2 weeks im doing everything i stretch and warm up and stay in them for 1 minute middles and fronts but they wont come down! my coach told me maybe my body isnt able to do the splits and its just how it is! BUt im very flexible i can do bone arrows and cobras and scorpions but mysplits are not down!!!! Help please