Toad: Cannot Load oci.dll: While Connecting

I installed oracle 10g on windows 7 successfully. I found everything is working except toad. I can connect the database through SQL*plus but when I open toad, my oracle installation is not appearing in the “connect using” box.

When I go through the toad user guide, find the following information how it finds client:

1.Toad first look in the toad command line for oci.dll

2. If it is not found, then it checks the command line argument ORACLE-HOME

3 3. If there is no toad home defined then toad will display the home that is set as the default home active in dropdown.

4 4.To populate the drop down, toad searches the registry as follows:

5.First, Toad reads the list of Oracle home names from the keys under HKEY_ LOCAL_MACHINE\SOFTWARE\ORACLE\ALL_HOMES
If no Oracle homes are found there, then the Oracle home is set to HKEY_ LOCAL_MACHINE\SOFTWARE\ORACLE
Otherwise, Toad finds the ORACLE_HOME value for each Oracle home, if it exists. Then Toad checks the system environment variable called PATH to see
whether it contains the "bin" folder under ORACLE_HO ME. Toad selects the

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