Microsoft commerce server Installation error

We have several hosts in the business server farm. While we try to install Microsoft commerce server, we experience a unusual error in setup method.
It states “The Direct Mailer Resource is already configured on another computer. Only one Direct Mailer resource is supported per deployment).
Upon OK button click on, the setup progression moves back the setup process.
Error
An error occurred when configuring the feature 'Marketing Direct
Mailer'. The configuration log file may have more details about the
error.
Error Summary:
The Direct Mailer Resource is already configured on another
computer (||||||||||||||||||). Only one Direct Mailer resource
is supported per deployment.
