Can't connect to cell phone, thinks it's in use

I switched accounts because my social stuff was interfering with work stuff. My new twitter (ravengirl57) won't let me connect to my cell so I can get alerts and DMs. It thinks the number is already used. Well, it was -- by me -- but I turned it off on the old account (jolinegkg, which is now strictly for work and tied to my work email; ravengirl57 is tied to my personal account). Please help me get my cell connected. It's 5057302793