Problem since moving to plusnet pro product(SOLVED)

[#1]

Since i moved to this product my speed has dropped drastically from 6.5mbps to barely 1mbps,i checked the gateway checker and in my router it says pcl,ag04,yet with the plusnet tool it says gateway unknown?related to the problems with this particular gateway or something more sinister?

[#2]

I have tried different gateways and am also on the Pro package ,my download speeds are also very poor considering my 4608 kbps sync speed.
Today 19:26 1050 kbps (131kB/s) 367 kbps (45.9kB/s)
Today 19:23 898 kbps (112kB/s) 366 kbps (45.8kB/s)
Today 19:15 815 kbps (102kB/s) 362 kbps (45.3kB/s)
Today 19:04 1137 kbps (142kB/s) 364 kbps (45.5kB/s)
Today 18:53 1170 kbps (146kB/s) 368 kbps (46kB/s)
some what different to what bt says.-
Download speedachieved during the test was - 2470 Kbps
For your connection, the acceptable range of speeds is 600-7150 Kbps.
Additional Information:
Your DSL Connection Rate :4608 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 4000 Kbps
i pay a premium for my connection to be good for gaming !!  

[#3]

This Problem Started with me at near end of november.
http://community.plus.net/forum/index.php/topic,81279.0.html
it Got Solved but then it decied to come back  and i hadn't had a reply.

And if you hadn't visit this topic.
http://community.plus.net/forum/index.php/topic,81831.0.html
Today.
20:29

21:31

17:20

[#4]

Not good guys,well ive been getting help from a member of staff in another thread and i think its my router that was at fault,ive too keep an eye on my line for an intermittent connection fault as when the plusnet staff tried to do a test on my line it was not possible,i powered down and plugged up an old belkin i had and my speeds have came back to normal.
Another line test however says i have a copper line fault but at that time of the test a loop fault,so some progress,everything was fine right up till yesterday.