Custom table not showing disk information

Hi,

I have created a custom table to display disk information for a group of servers. Its only pulling some of the information in and not all. I have ensure the List Resources includes the disks of the blank servers.

However it wont show it in the custom table. Below is a screenshot. As you can see its showing Free Space and capacity for some servers but not all. If I go to the servers idiviually it populates disk information and the credentials are fine

Any pointers as to what I am doing wrong?

Thanks