Executables in Alternate Data Stream would't execute

I'm getting this error upon executing an exe thats an alternate data stream.
like executing
start .\1.txt:notepad.exe
gives
"file does not have a program associated with it for performing this action"

normally executing notepad.exe and other exe's work.
I guess this is happening in Vista only. Haven't tried in XP but read many howto's for doing it and they're all in XP.

Is it a security fix in Vista ? Can it be undone anyhow ?

Thanks