Unable to install SQL SSRS add-in for SharePoint

I am unable to install MS SQL SSRS add-in for SharePoint 2010 in a two tier architecture. The following message is displayed while running the Add-in installation:

"Please ensure Microsoft SharePoint Technologies is installed"

The environment setup is as mentioned below:

SharePoint Server

Has SharePoint 2010 installed

Hosts Central Administration.

Has SQL 2008 Reporting Services installed.

SQL Server:

Has SQL 2008 R2 installed in SharePoint Integrated Mode

Has SQL Reporting Services

Has SharePoint Server installed, configured and joined to two tier farm.

Could you please help resolve this issue?