remote access issue

[#1]

Hi All
I have a TG582n router, and I have a number of CCTV cameras I need to access, I use dyndns.org on the router and NAT to get to them on my previous ISP's but the Plus net router is nothing like any other ISP router I have seen, so different.
So say from my phone CCTV app I connect to myname.dyndns.org:81  (etc) ..... and this translates on the router to 192.168.1.50:81 but I cant get it to work with any of my camera's on this router
I have followed guides such as this http://portforward.com/english/routers/port_forwarding/Technicolor/TG582n-O2_Technicolor/Cobra_Elite... (even though different ISP same options) no luck, any ideas ?  The ports dont show as been open on port scan either.
Any ideas ?
I called plus net support the guy was helpful but said its not something they support.  I asked about this when I ordered and was told it would work.  

[#2]

Have you check Plusnet Firewall?
Login to the Members centre, select connections settings, then select Broadband Firewall.

[#3]

Firewall shows as been "Off"

[#4]

Does this post help at all?
http://community.plus.net/forum/index.php/topic,113303.msg1170658.html#msg1170658

[#5]

Yes thats great, managed to get them all working now, looks like i was doing similar to the other person

[#6]

Great news, thanks for getting back to let us know.