Holster 3.321 would not install in Vista

[OneEskalera]

Hello!!! I just recently got an upgrade version to my Holster. From 3.315 to 3.321. Before installing this 3.321 on my Laptop with Vista Home Premium, I moved my playlist to C:\MTU\Holster\Playlist folder and leave my Kma song files on my external drive. Then I started the setup and went smoothly untill it reached the installation window (after clicking install button window). It runs for awhile about 1/3 blue progress bar, then there this error window appear and says: Feature Tranfer Error, Feature: Holster, Component: App Executables, File - , Error: Acess Denied and after clicking OK button, installation window disappeared and installation stop. Tried several times without success and stopping at the same point. With the same error message. Please help... I tried to look for an answer in the discussion forum but did find any related problem. I guess Holster cannot be upgraded under Vista as the warning says on the the "instruction to ugrade holster 3.321 under window vista. Note: Had UAC disabled during the setup process

Another question, Does my computer need to be connected to internet to do the upgrade from Holster 3.315 to 3.321 on XP Home edition?