Finally I done it using brute force.
In PHPAdmin I found every single DNS record for items that remained in RecycleBin , and I deleted them.
And it was effective.
ISPConfig as well as other sites are still fully operational.
But, there is another issue.
I hosted website neoplanta.com and few days ago I deleted it.
But I see that tehre is lot of entires remained in Database (I removed them), and complete website structure remained???
Allthogether with symlinks in /var/www ??
I tought that all of that has to be deleted when I delete site in ISPConfig ?
Debian Lenny & ISPConfig 3