So bad no one answered :-(
I solved it by moving all the sites on another server.
It was not possible to change permissions to the dll (even logged in as Administrator).
Probably it is one of the following:
- incompatibility between Plesk 10.4.4 and Virtuozzo (both parallels products!!!)...
We have 2 new VPS with Windows server 2008 r2 (running on virtuozzo), IIS 7.5 and Plesk 10.4.4
We moved there a lot of old websites with classic ASP mail form using cdosys.
They worked fine on the old server win 2003 IIS 6 and Plesk 9.3 but now they show up an error:
Microsoft VBScript...