middlegen.MiddlegenException: Couldn't connect to database: Io-exception:

Hello forum, I was attacked by spyware then I made a good clean-up, after 
that my middlegen stopped working, giving the following errors.Before I 
clean my computer middlegen was working fine. all ideas are welcommed.
thanks
*****************************************************************************
Microsoft Windows XP [version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\GNU\WinCvs 1.3\CVSNT\middlegen\samples>ant
Buildfile: build.xml

init:

fail-if-no-xdoclet-1.2:

check-driver-present:

panic-if-driver-not-present:

middlegen:
[middlegen] Database URL:jdbc:oracle:thin:@localhost:1521:pusdb

BUILD FAILED
C:\GNU\WinCvs 1.3\CVSNT\middlegen\samples\build.xml:228: 
middlegen.MiddlegenException: Couldn't connect to database: Io-undtagelse: 
The Network Adapter could not establish the connection

Total time: 4 seconds
C:\GNU\WinCvs 1.3\CVSNT\middlegen\samples>

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