postgresql : xml parsing : xpath return only one record, where is xml contains 3 records

I have a procedure in postgresql with xml type paramter. I need to parse xml and insert record in a table. I tried this way, but it is inserting only one record in table, where as xml contains three records.

the xml code is

Select (xpath('/ArrayOfUserGroupModulePermissionBusinessObject/UserGroupModulePermissionBusinessObject/ModuleID/text()', t1))[1]::varchar::BIGINT AS ModuleID
from (Select Perms::xml as t1) as t2;

the xml is here

<ArrayOfUserGroupModulePermissionBusinessObject xmlns:xsi="http://ift.tt/ra1lAU" xmlns:xsd="http://ift.tt/tphNwY">
  <UserGroupModulePermissionBusinessObject>
    <UserGroupModulePermissionID>0</UserGroupModulePermissionID>
    <UserGroupID>0</UserGroupID>
    <ModuleID>3</ModuleID>
    <ModuleName>Administration</ModuleName>
    <CanRead>false</CanRead>
    <CanAdd>false</CanAdd>
    <CanEdit>false</CanEdit>
    <CanDelete>false</CanDelete>
    <CanPrint>false</CanPrint>
  </UserGroupModulePermissionBusinessObject>
  <UserGroupModulePermissionBusinessObject>
    <UserGroupModulePermissionID>0</UserGroupModulePermissionID>
    <UserGroupID>0</UserGroupID>
    <ModuleID>2</ModuleID>
    <ModuleName>Data Management</ModuleName>
    <CanRead>false</CanRead>
    <CanAdd>false</CanAdd>
    <CanEdit>false</CanEdit>
    <CanDelete>false</CanDelete>
    <CanPrint>false</CanPrint>
  </UserGroupModulePermissionBusinessObject>
  <UserGroupModulePermissionBusinessObject>
    <UserGroupModulePermissionID>0</UserGroupModulePermissionID>
    <UserGroupID>0</UserGroupID>
    <ModuleID>1</ModuleID>
    <ModuleName>Reception</ModuleName>
    <CanRead>false</CanRead>
    <CanAdd>false</CanAdd>
    <CanEdit>false</CanEdit>
    <CanDelete>false</CanDelete>
    <CanPrint>false</CanPrint>
  </UserGroupModulePermissionBusinessObject>
</ArrayOfUserGroupModulePermissionBusinessObject>

I don't know what is wrong in this sql