doesn't shift into correct gear
forgive the newbie question, but i am having some trouble with my bike.
I normally ride in 2-4, 2-5, or 2-6... I start from a stop sign in 2-3. I know that when I shift I should be pedaling...
The problem is that when I shift from 2-6 to 2-5 and sometimes from 2-4 to 2-5 it doesn't go into gear. Also, when Im riding in 2-4 or 2-5 it makes a sound like its inbetween shifts.
THe bike was brand new when I bought it and I probably have somewhere in the neighborhood of 80~100 miles, mostly ALL paved trails.