HELP!!! URGENT

Hi all!

I have a problem with the J2EE Engine. Yesterday night it works today morning doesnt work. In the MMC are all GREEN. I try to sing in the Visual Admin and gives an error that says: "Cannot open connection on host <hostip> an port 50004", also i try to sing in the SDM ans try to deploy an applicattion on NDS and gives another error that says: "CdmXmlFactory could not find Top Element within String: "null"". I already modify the hosts file and nothing happends.

I hope somebody can helps me, is URGENT please.

Thx.

Best Rgds.

Gregory.