New octo LNB no horrizontal

[dynomikered]

Hi
Just put a new octo lnb on my dish and i can no longer get horrizontal channels. I have a dreambox dm500 and a vu duo+ The problem is only on the dreambox, both connected to the same lnb so can not be the lnb. At a loss to what is the problem
thanks for help in advance
Mike

[digicon]

Its an Octo LNB just because your duo is fine dont think its not the LNB they are prone to Port failure i would suggest you try the dm500 on another spare port you have