asp create folder doesnt work :(

So far i am very, very happy with the Plesk interface though some bits a bit confusing. However i have just hit a stumbling block and heres the issue...
I have a very simple create file/folder script written in asp that does not work yet its fine on my reseller account, i have checked and checked to make sure its not the script, is there an option in the plesk panel that i must select to enable creating folders and files?
secondly if thats the case can i create permissions for this to work in just 1 admin folder?