IPS upgrade

Hi Folks,

I installed the IPS 4.1 - SP5 and Data Service 4.2 SP6 on Windows system. I read the oss note 1740516 and it says that the correct version for Data Service 4.2 SP6 would be IPS 4.1 - SP6 0-2

I downloaded the IPS 4.1 -SP6 and tried to install it and I got the following option error message:

Information Steward and Data SErvices compatibility - failed.

SAP Data Services and/or Information Steward deployment was detected in your machine.

My question is: Do I have to install before all the patches from IPS 4.1 SP5 and then upgrade it to version SP6 ?

Thanks,

Paula