Only Subdomain Error server not found (sometime) in ispcp 1.0.7

[tyaskp]

Hi all,

I just install ispcp 1.0.7 on my debian 6 32bit VPS. it working very good in main domain.com . The problem is sometimes (not all the time) the subdomain error with "server not found". that error includes http://ftp.domain.com, admin.domain.com sometimes its hard to open and i have to wait for a while.

I have little experience in handling server so i have really no idea

Is anyone have solution or the same problem like this. Heellpp. Thanks before.