Cannot Load OCI.Dll

Hello:
I just installed the 64-bit version of 11g Release 1 (11.1.0.6) on a server that is running 64-bit Windows 2003 Server.
The installation was successful and I checked using SQL Plus. I am able to log and execute queries. I am also able connect using SQL Developer.
However, when I tried to use SQL Navigator (version 6.1) or Toad 10.0, I get an error message "... Cannot load OCI.DLL".
When I tried to install another COTS product, it complains that it was unable to find Oracle Client and/or Oracle OLE Objects.
I was trying both the tasks on the server itself.
Any ideas on how I can resolve the issues?

I have the same problem: Oracle 11 R2 on Solaris x86-64 and Oracle client (11.1.0.7.0 x64, unfortunately, there's no client higher than that version.). After installing TOAD 10.1 i've checked client connection:
SOFTWARE\WOW6432NODE\ORACLE (Oracle Root)
ORACLE_HOME_NAME:
ORACLE_HOME: C:\app\User\oracle
ORACLE_SID:
NLS_LANG:
SQLPATH:
LOCAL:
C:\app\User\oracle\Bin exists.
C:\app\User\oracle\Bin is in PATH.
Client DLL: C:\app\User\oracle\Bin\oci.dll
Client Version: 11.1.0.7.0
Home is valid.
So, TOAD can see the client, but when i'm trying to connect it i got an error:
Cannot load OCI DLL: oci.dll
Any suggestions?

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mseberg wrote:
So is this a Toad issue or an Oracle client issue?More like a general software or programming "issue". If Toad (or other program) is 32-bit, then loaded libraries (e.g. Oracle Client dll's) needs to be 32-bit.
I'm sure this is documented in requirements for Toad. See e.g. [url http://toadfororacle.com/servlet/KbServlet/download/4264-102-12585/10.6_ReleaseNotes.htm#SystemRequirements]Toad 10.6 Release notes.
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Hello,
my environment is:
MS Windows 2003 R2 SP2 Enterprise x64 Edition
Oracle Database 10g Release 10.2.0.1.0 - 64bit Production
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Help welcome!!!

Hummm....
this should be the cause.
I have Oracle Database 10g Release 10.2.0.1.0 - 64bit Production. Then all the executables including DLLs are 64-bit version compiled.
Now... I guess that the TOAD software is 32-bit application and it can not load 64-bit OCI.DLL.
Thanks to EVERYBODY evolved!!!
By the way:
The TOAD for Oracle Freeware - version 8.5.0.50 g (from Quest Software) is the latest version available from Quest Software.
Regards,

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