I didn't know exactly where to put this question so I just stuck it here..hope its ok

I've withdrawn at least twice in the past through echeck which gets deposited electronically into my bank account and it has worked. This past week I made three seperate withdraws and I know for sure that one of them (I think the middle one) has been declined. I got an email from stars saying:

Your recent Echeck cashout has been rejected with the reason 'Invalid
Account or Routing Number'.

I emailed back and they say that any more withdraws probably won't go thru either and that they were not told a specific reason why.

Does this happen alot? It seems stupid that it would suddenly happen esp having worked before. I would contact my bank directly but I don't have any kind of echeck routing number or something so they can see what happened.