Increasing flexibility?

I'm having problems
increasings my leg flexibility. I have done stretching exercises for like 2
weeks for like 2- 5 min a day. The problem is im not seeing any improvement or
mild breakthrough at all...i mean cmon, im not even 18 yet..

tips or comments are appreciated, thnx!
I'm working on the same thing, with anything it takes patience and
persistence.... I'm inspired by the gymnasts and stuff so.. what I started to do
was just try to stretch after my cardio workouts, that way I'm all ready warmed
up to do it... and then once I got good at it, I made that into a warm-up for my
cardio... along with muscle training.

And, I've found that doing stretches after you workout or play a sport, makes it
easier to do the actual stretches themselves. I've seen pretty good results with
that, and with just a few weeks literally i can touch my toes standing and on
the ground and i can do backbends and high kicks.
try doing it for longer each day. as a gymnast, i know that flexibility comes
realy slowly. it took me 3 years to get my splits!