Plesk in Subdomain

[plizer]

Hello!

I have a problem with Plesk. I have a server to install a shopsystem (Shopware), but I can never use the domain to get there. Everytime I use the mydomain.com there is the login screen of Plesk, but I need to have my shopsystem under my domain!

How can I solve this problem? I worked on that for about 3 weeks now! :-(

I hope someone can help me!

Thank you very much!