All the legit brokers put restrictions on high volatile stocks as a way to protect their customers. Especially OTC. Also if they feel your ask or bid is to far away from existing, they wont place the order.You will have to contact them to clear it.
Good morning, Etrade just called me and told me that RGBP just issued more shares and did this last night, so all my previous sell orders of RGBP have to be put again. may not be able to do it till this afternoon or Monday. Things are brewing !!!!!!!!!!!!!!!!!