Site path modified in IIS but not taken into account

Hi,

We have a recurring problem on some of our machines.

We have approximatively 30 IIS sites.

We automated our application deployment by unzipping the binary and switching the PhysicalPath of the sites using set-itempropery cmdlet.

Some of our sites are not updated : the loaded dlls are from the older version of our product.

I checked with Process Explorer, I periodically see the older dll trying to be loaded from Temporary Aspnet Files.

I tried to recycle the app pool, the problem persists, only a iisreset /restart seems to solve the problem.

Any clue ?