Natural Development Server initialization problem . . .

Hi there.
this is my first post. . . so, sorry if i do mistakes.

I have installed the NDV for mainframe.
the started task runs ok but send to me this messages:

00000000 O4I not available. 0xC4070044
00000000 Start of O4IBP thread failed RC: 4

Where can I find information about this mini-errors ?.

I have created an userid to open sesión in my NDV task… but ever writes the sames errors:

00000009 NDV Error. Error at: Session runtime connect failed
NATURAL runtime error. Function01, RC=3048
NAT3048 Error durint Open Processing. DB/Subcode 24/8. ETID=useridxx

Can anybody helpme ¿?
thanks a lot.