It is not required to uninstall CS5. Please download AAMEE3.1 and create deployment package for CS6 and then try installing it.
CS6 deployment guide link: http://www.adobe.com/devnet/creativesuite/enterprisedeployment.html
It is not required to uninstall CS5. Please download AAMEE3.1 and create deployment package for CS6 and then try installing it.
CS6 deployment guide link: http://www.adobe.com/devnet/creativesuite/enterprisedeployment.html