CampaignService always returns empty results

Hi,

I'm trying to query the CampainService for a list of client account's campaigns, but the result is always 0:

<totalNumEntries>0</totalNumEntries>

I also tried your example from the PHP-SDK lib (v201605) -> GetCampaigns.php but with no success.
I am able to query the ManagedCustomerService for a list of client accounts so there should be no permission issue or whatever, I guess.

I would like to provide logs for SOAP and request.

Thanks in advance.

Olli

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