Call parking issue SPA 9000 + 942

[mateomateo1]

I am having issue with call parking on my PBX system (SPA 9000 + 2 phones 942 series),

when I park let's say 2 external calls or even 1 then I can not come back to any of them (callers hear music on their lines when on hold but that is it)

What steps should I take?  Is that feature should be configured automatically, or do I have to do anything to get it going?

[nseto]

If you used the setup wizard, this should be working properly.

The default star code for park is *38 and unpark is *39.

So if you parked in slot 1, it would be *38 and then 1.  Unpark would be *39 and then 1.

[mateomateo1]

it is somehow not working, when I take the call and want to park it - I can do this fine, caller hears the music on hold, then  when I want to come back to that call it is also ok, I can do that, but the caller still hears the music on hold but when he is speaking something I can hear him fine (he cannot hear me speaking), even if the music is on.

What would be next step, firmware upgrade??