Problem with moving a failover IP block from a server in SBG2

Hi,
One of the servers I'm managing was in SBG2. I'm trying to move a failover IP block away from this server.
I have a VPS in GRA, but it doesn't show up as a viable option to move the block.
So I've tried at least park the block (move to IP parking). It should take just few minutes, but I'm waiting for about an hour and the block still hasn't moved. When I try to move it again I only get an error, that the move operation is in progress.
Maybe the system is stuck in trying to "talk" to something in SBG and it doesn't get any answer? Failover IP should allow for a quick switch to a server in a different DC in cases like this.