move-Item : move files to a file but a directory

Hi , everyone

I have a question followed.

i want to move some pdf files to a directory .  the ps command as follows:

gci . -force -Recurse -include *.pdf | Move-Item  -Destination "E:\AllPdfFile" -Force | out-null

but ,  i haven't creat a directory named "AllPdfFile" . then che command's result is to create a file named AllPdfFile. what should i do to get my pdf files back ?

/////////////// command result ///////////////////

PS E:\> gci * -Include All*

    directory: E:\

Mode                LastWriteTime     Length Name
----                -------------     ------ ----
-a---         2012/2/18     22:56   78139946 AllPdfFile

/////////////////////////////////////////////////////////////

any one can help , thanks very much !