user not authorized to Create users - SAP SRM SUS

Hi Experts,

SRM Version: SAP SRM 7.0 EHP2

When The Admin user of Supplier with role :

/SAPSRM/SUS_ADMIN_SUPPL_EHP1

is trying to create users in the Supplier Self Services he is getting error "you are not authorized to create users".

Have I missed some role ?

Regards

Sushant