ClamWin: U3 format problem

I tried to put Clamwin into U3 format but I get a problem when I tried to download the new virus definitions:

Could not start process:
"C:\Program Files\ClamWin\bin\freshclam.exe" --stdout --datadir="C:/Documents and Settings/All Users/.clamwin/db" --config-file="c:/docume~1/than/locals~1/temp/tmp8vuov6" --log="c:/docume~1/than/locals~1/temp/tmpizwjzu"
Error: Could not start process.
C:\Program Files\ClamWin\bin\freshclam.exe
File does not exist.

it was clear that Clamwin doesn't recognise the drive letter (mine was H:) so it goes to drive C:

I didn't edit anything yet. So I think I have to edit a perimeter somewhere so that ClamWin would recognise the U3 drive letter.

ps. Here's my U3 package