NDMP clients offline

Greetings,

Here is another one.

Have a Master server with several ndmp storage clients that are offline and will not go online.

When online is selected, nothing changes. No error message or code.

When checking the policy configuration for the ndmp clients, the policy type field is blank and when trying to select ndmp, that option is no longer a choice.

Everything was running for the last 90 days. Unsure of what could have effected the Master server.

Has anyone ever had anything similar happen and what to try?

Running Windows server 2008 OS with NetBackup 7.5

Thanks,

Glenn