Error installing Moodle with IIS, MSSQL Server

Hi All,

I have Moodle 2.4.2 installed and working in the IIS server with MS SQL Server as database.

As we have about 5000 documents to be migrated. I have to install Moodle1.9 and then upgrade it to Moodle2.4.2

When i try to install Moodle 1.9 last latest version with MSSQL Server. During installation i get this error.

PHP has not been properly configured with the MSSQL extension so that it can communicate with SQL*Server. Please check your php.ini file or recompile PHP.

I followed the instructions in Moodle installation page for MSSQL Server. But still i get the error.

Please help me and let me know how can i install Moodle 1.9 in IIS Server 7 with MSSQL server 2008. Do i have to make any changes in PHP.INI File.

Thanks in Advance

Vinoth