Well, that's an issue with which I can empathize but not assist. It's my biggest problem with my resume, too -- that on paper I'm perfectly qualified for programming/software engineering jobs, but I hate (and am bad at) programming, so it never ends well. I've gotten the occasional interview for a software job, too, back when I was bothering to apply for them, and each time there'd be a coding interview and it would destroy me because, no. Ugh. So yeah, I hear you; it sucks.

At least you were in sales, though! That must mean you have good communication skills and suchlike. Talk that up in your cover letters; employers love that stuff. (So I hear. Those are not exactly soft skills I can boast, personally, so I don't know from experience.)