use parentheses around @col as in exec(@col) - they're needed in this case

Resolved.

I was looking at application eventlog as a non-admin and since those message rll's are under MSSQL folder in the hierarchy, and MSSQL is only allowed for admins, therefore they...

What message are you getting in the event log? Your message, or the generic (see my later post "The description for Event ID...") one with yours buried in the end?