Aljazeera has hidden pids, you won't be able to scan them in, you have to manually enter these pids by editing a channel alreeady scanned in for this frequency.
To do this, make sure you a few fta channels scanned on the same frequency as Aljazeera, this may mean that you two of the same channels scanned in for this freq, this ok for now
on my Strong 4652 this is how I did this
go to menu enter>
select channel menu enter>
select channel edit enter>
select the channel you wish to enter with the Aljazeera pids, if your str5ong menu is the same as mine it should very simple to make these changes.
first of all edit channel name to Aljazeera
then edit Vpid to this 1121
then edit Apid to this 1122
then edit Ppid to this 1121
hit escape and bob's your uncle!!!