New Mdaemon accounts can't recieve outside mail

[OlSmokie]

We have a server running MDaemon pro 8.0.4 and it has been working fine since we had it set up in 2008. We have never had to add accounts untill now, but this week we added two new e-mail addresses using the new account tab.
Both accounts can send and recieve mail internally, and they can send mail out, but they can not recieve mail from an outside source. The sender gets a "511 cuda_nsu sorry, no mailbox here by that name" message.
The mailboxes were created in the same folder as the working ones, and all of the settings are identical to the other accounts.
The log just shows that there was an error

Sun 2011-10-16 10:27:54: Session 172; child 1
Sun 2011-10-16 10:27:54: Accepting POP connection from [24.235.180.132 : 2048]
Sun 2011-10-16 10:27:54: --> +OK XXXXXXXX.ca POP MDaemon 8.0.4 ready <MDAEMON-F201110161027.AA2754187MD2033@XXXXXXXXX.ca>
Sun 2011-10-16 10:27:54: <-- USER
Sun 2011-10-16 10:27:54: --> +OK ... User ok
Sun 2011-10-16 10:27:54: <-- PASS ******
Sun 2011-10-16 10:27:54: --> -ERR access denied
Sun 2011-10-16 10:27:54: POP session terminated, (Bytes in/out: 14/142)

Any insights would be greatly appretiated.