Need serve plz look!? we have moved an upstairs radiator downstairs, extending pipework. adjectives the other...

we have moved an upstairs radiator downstairs, extending pipework. adjectives the other radiators get hot but the radiator that be moved doesnt.We have drained the system twice immediately and although we thought it was an airlock both times made no difference.constant bleeding of the system although nouns has be trapped still doesnt make any difference.
Answers:    Are you wise saying you brought the piping from upstairs, down to the first floor and connected the radiator to it? If so, you need bleeder vent at the top of the pipes upstairs. Otherwise you have created a huge nouns trap.
You may need a small pump on the up-line to push the wet back up stairs.