Can't login to any Oracle Database using PL/SQL on new machine

I am trying to upgrade from D610 laptop to a D630 laptop. I have PL/SQL installed on the old machine with Oracle 10g.
The same were just installed on the new machine.
Both have a Windows XP operating system.
I can not login to any Oracle databases on the new machine, even though it has the same operating systems and the same versions of PL/SQL and Oracle 10g installed as the old one. I've already set my preferences on the new machine to match the old one.
When I try to login to any Oracle database, I get a small error window that does not contain any error number or description, just an OK button. If I click OK, I am directed back to the login window. Eventually, PL/SQL just opens without logging into a database.
Can't find anyone to help me correct. Can you help? Thanks!
 
Can you go to Help > Support Info, press the 'Copy all pages' button on this info screen, and paste this text into an e-mail reply?
 

--- Info ---

PL/SQL Developer
Version 7.1.5.1398
02.45296 - Unlimited user license
Windows XP Professional 5.1 Build 2600 (Service Pack 3)

Physical memory : 1,038,228 kB (185,884 available)
Paging file : 2,495,804 kB (1,790,884 available)
Virtual memory : 2,097,024 kB (1,983,920 available)

Parameters
C:\Program Files\PLSQL Developer\plsqldev.exe

Preferences
Session mode: Multi
OCI Library: c:\oracle\ora102\bin\oci.dll
Use OCI7: False

Preference Files
C:\Program Files\PLSQL Developer\Preferences\Default\Default.ini
C:\Program Files\PLSQL Developer\Preferences\mcj0256\default.ini

Plug-Ins

Aliases
CONV1D
CTLCNVA
CTLCNVB
CUP1-FLASH
CUP1-VET1CUP1
...

Homes
OraHome10gR2 (C:\oracle\ora102)
OraHome9i (C:\oracle\ora9i)

DLLs
C:\oracle\ora102\bin\oci.dll

TNS File
C:\oracle\ora102\Network\Admin\tnsnames.ora

Using
Home: OraHome10gR2
DLL: c:\oracle\ora102\bin\oci.dll
OCI: version 9.2

--- Registry ---

SOFTWARE\ORACLE
inst_loc = C:\Program Files\Oracle\Inventory
API = C:\oracle\ora9i\dbs
NLS_LANG = NA
ORACLE_GROUP_NAME = Oracle - OraHome9i
ORACLE_HOME = C:\oracle\ora9i
ORACLE_HOME_NAME = OraHome9i
OLEDB = C:\oracle\ora9i\oledb\mesg
OO4O = C:\oracle\ora9i\oo4o\mesg

SOFTWARE\ORACLE\ALL_HOMES
DEFAULT_HOME = OraHome9i
HOME_COUNTER = 1
LAST_HOME = 0

SOFTWARE\ORACLE\ALL_HOMES\ID0
NAME = OraHome9i
NLS_LANG = NA
PATH = C:\oracle\ora9i

SOFTWARE\ORACLE\HOME0
ID = 0
NLS_LANG = AMERICAN_AMERICA.WE8MSWIN1252
ORACLE_BUNDLE_NAME = Enterprise
ORACLE_GROUP_NAME = Oracle - OraHome9i
ORACLE_HOME = C:\oracle\ora9i
ORACLE_HOME_KEY = Software\ORACLE\HOME0
ORACLE_HOME_NAME = OraHome9i
SQLPATH = C:\oracle\ora9i\dbs
ORAMTS_CONN_POOL_TIMEOUT = 120
ORAMTS_CP_TRACE_DIR = C:\oracle\ora9i\oramts\Trace
ORAMTS_CP_TRACE_LEVEL = 0
ORAMTS_NET_CACHE_MAXFREE = 5
ORAMTS_NET_CACHE_TIMEOUT = 120000
ORAMTS_OSCREDS_MATCH_LEVEL = OS_AUTH_LOGIN
ORAMTS_SESS_TXNTIMETOLIVE = 120

SOFTWARE\ORACLE\KEY_OraHome10gR2
ORACLE_HOME = C:\oracle\ora102
ORACLE_HOME_NAME = OraHome10gR2
ORACLE_GROUP_NAME = Oracle - OraHome10gR2

SOFTWARE\ORACLE\OLEDB
CacheType = Memory
ChunkSize = 100
DisableRetClause = 1
DistribTX = 1
FetchSize = 100
OSAuthent = 0
PLSQLRSet = 0
PwdChgDlg = 1
SchRstLng = 10000
TraceCategory = 0
TraceFileName = c:\OraOLEDB.trc
TraceLevel = 0
TraceOption = 0
UserDefFn = 0
VCharNull = 1

SOFTWARE\ORACLE\OO4O
CacheBlocks = 20
FetchLimit = 100
FetchSize = 4096
HelpFile = C:\oracle\ora9i\MSHELP\oracleo.hlp
OO4O_HOME = C:\oracle\ora9i\oo4o
PerBlock = 16
SliceSize = 256
TempFileDirectory = c:\temp

SOFTWARE\ORACLE\OracleMTSRecoveryService

SOFTWARE\ORACLE\OracleMTSRecoveryService\Protid_0
Host = vm-dell05_Build-1.DEVAD.sprint.com
Name = HTTP
Port = 2030

SOFTWARE\ORACLE\OracleMTSRecoveryService\Setup
NumberOfInstalls = 
 
--PATH--
c:\oracle\ora102\bin
C:\Program Files\Serena\Dimensions 10.1\CM\prog
C:\WINDOWS\system32
C:\WINDOWS
C:\WINDOWS\System32\Wbem
C:\Program Files\QuickTime\QTSystem\
C:\Program Files\Open Text\Livelink Explorer\
C:\Program Files\Common Files\Roxio Shared\DLLShared\
C:\Program Files\Common Files\Roxio Shared\9.0\DLLShared\
C:\Program Files\Credant\Shield v5.4.2\
C:\Program Files\Windows Imaging\
C:\Program Files\Informix\Client-SDK\bin
C:\Program Files\IDM Computer Solutions\UltraEdit-32
C:\oracle\ora9i\bin
C:\Program Files\Oracle\jre\1.3.1\bin
C:\Program Files\Oracle\jre\1.1.8\bin
 
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