no wpa option in gui, cpu help

[evan]

i am new at this and i have the program loaded up my .cap file converted to hascat format and wordlist ready. the problem is there is no wpa option in hash type on the cpu only. i see it in the hashcat plus but that is only for gpu and i only have a cpu. i cant figure it out please help? im sure its somthing really stupid and simple.
thanks