If you do not have the three MSL extensions (MSL C.PPC.DLL, MSL RuntimePPC++.DLL, MSL runtimePPC.DLL) active in your extension set that were installed during the Peak installation process, but you have the RealAudio extensions folder in your System's Extension folder, then you will receive this error message. If you plan to use Peak 2.0 to encode sound files in RealAudio 5.0, then you MUST have the three MSL extensions active. If you do not plan to use Peak 2.0 to encode files with RealAudio, then remove BOTH the RealAudio folder AND the three MSL extensions from your System's Extension folder.