Trying hard to get an internship position

hi all out there am a social scientist switching over to IT and am very good at what i do. LAN configurations and administration..the only problem is that each time i write my cv and are called for a job interview no one wants even to give me a chance to show them what i can do, they keep doubting because of the fact that i have a B.A in another field.
Am asking how would i convince someone to let me be an intern?? by the way i have a diploma in IT from a reputable institution and are one of the fastest learners thinking of N+ and MCSE