curly hair going straight

Hello fellow Curly Sue's,

I few years back I had an episode of "break up" hair and got a great cut with bangs....since then I have been straightening my hair every 2-3 days to accomodate my layered styles. Now that its longer I'd like to wear it curly again but I have seemed to have lost my curl. When I naturally dry my hair the top and middle go wavy and the underneath is poker straight. I have purchased the shampoo, conditioner and curl activator foam from Bumble and Bumble and I'm not getting any results. Any suggestions?