I'd like to understand subdomain system in ISPC. Seems it doesn't work as it is right. I've client XXXX and domain www.XXX.com. Creating subdomain i.e. shop.XXX.com doesn't work. I have to create normal domain and attach it to my client. So anyone can tall me what does subdomain mean in ISPC?
Subdomains work perfectly, they are used to link a additional subdomain to an existing website. Most likely you missed to create a dns A-record for the subdomain if you can not reach the conmtent of the master website of this subdomain. If you want a separate vhost, you have to create a new website instead of a subdomain.