Sky Drive on OSX

Hi,
My wife has a Vaio w Win 7. I can drag and drop a file from her desktop to her SkyDrive.

I have Hotmail also. I tried that on my MBP w OSX Lion, latest version installed and updated, etc... and I can't drag and drop a file from my Mac Desktop to my Sky Drive. Is it a Mac--PC thing or am I doing something wrong??
Thx.
Frank

Well... found out through trial and error it isn't an OSX thing, but rather a Safari thing. Works just fine on my Mac w Chrome and Firefox.
Frank