when i tried to import my png sequence from my folder to my ae cc 2014 composition i dont have the option to import it as a sequence
Nobody can tell you anything without proper system info or other technical details like the actual numbering and otehr details of the files, storage locations and so on.
Make sure that your CC 2014 is up to date. It should be 22.214.171.124
You should be able to see this
If you are up to date and you still can't see the option to import as a sequence or the png format is blacked out then check the png files and make sure they are RGB and 32bit - millions of colors and straight alpha and not interlaced.