How to create folder in home folder on server

Does anybody knows how to get access to home folder of ftp server?

I have to upload files with name “” to folder ftpHome+“user_passwd”
The problem is the server give access only to the existing folder which name is “user_passwd”
Other words,

do shell script "curl -Q " & quoted form of ("MKD /" & itemName) & space & "ftp://user:passwd@ftpURL" 

does well, but it creates folder “itemName” into folder homeFolder+“user:passwd”, however I need to create folder right in homeFolder

Is any way to solve?