When a question is closed, it's important to act on it right away. A closed question with a score of zero or lower can be automatically deleted after nine full days if it is not reopened. And the best way to have your question noticed for possibly reopening is to edit it; a closed question which is edited is automatically queued for review.
In this particular case, again I won't speak for the five people who voted to close your question, but it did not appear to be relevant in a professional context. We have to maintain this separation between professional and amateur/enthusiast in order to avoid becoming technical support for the whole Internet, which unfortunately some people seem to already think we are.
So the best thing to do if you have a question where you are sure it is in a professional context, but it was closed as unprofessional, is to edit the question to clarify that aspect of the question. (If you intend to do so after reading and considering the rest of this answer, let me know, as moderators can undelete the question.)
I noticed that shortly before your post was deleted, you left a comment, which almost clarified this.
System is not 24x7. Plesk panel is for final users to manage some points in an easy way (like FTP accounts necessary for the project). Perhaps i'm a bad professional, but i can't understand why i need spend my time (and yours) justificating the system or my procedures. The question was not that. This starts to seems too much to Brian's Life scene with punishment for saying Jehovah. I'm just atonished whith some of the people in this site o_O
Actually, it's more like being dressed for the part. One does not expect to see their lawyer in nothing but underwear, for instance, at least not in a professional setting.
I've already noted that simply using a web control panel such as Plesk puts the professionalism of the operation in doubt; using it on Windows/IIS makes it even more doubtful. These are niche products intended for the web hosting industry, generally supported within that industry, and widely used in situations where they are a poor fit.
While it's certainly allowed for a professional web hosting company to seek support here, they are usually better served by contacting the control panel vendor's support channels directly. So, for this question, I would expect to see a lot of clarification of the professional context: how this server came to be, what it's being used for, etc.
As such, I expect your first line of support should not be any Stack Exchange site, but the vendor, Parallels.