Slow broadband after exchange upgrade

Question

My exchange (Accrington) was recently upgraded. Prior to the upgrade I was getting approx 5.5Mb.
I was told that I would need to wait 10 days after the upgrade for re-training of my line.
After 10 days, my connection had dropped to 1.6Mb, so I called BT and was told that it was because I had a home hub version 1.0 and that it was incompatible with the upgraded exchage.
New version 2.0 Hub was sent to me and this has now been connected for 5 days. I also took the opportunity to move things arround so the new hub is connected directly to the master socket, there is no extension wiring and no telephone connected. (Master socket has BT broadband accelerator filter fitted)
I have used BT speedtest and got the stats from my hub. My IP Profile is no where near what it used to be, I would have expected this to rise after 5 days ?
Any suggestions as to what I should do now ?
By the way I am 456M from the exchange !
Line state
Connected
Connection time
0 days, 19:09:33
Downstream
2,268 Kbps
Upstream
1,184 Kbps
VPI/VCI
0/38
Type
PPPoA
Modulation
ITU-T G.992.5
Latency type
Interleaved
Noise margin (Down/Up)
28.9 dB / 4.4 dB
Line attenuation (Down/Up)
16.0 dB / 7.1 dB
Output power (Down/Up)
0.0 dBm / 13.0 dBm
Loss of Framing (Local)
0
Loss of Signal (Local)
0
Loss of Power (Local)
0
FEC Errors (Down/Up)
0 / 4294967137
CRC Errors (Down/Up)
0 / 2147480000
HEC Errors (Down/Up)
nil / 0
Error Seconds (Local)
0
1. Best Effort Test: -provides background information.
Download Speed
1555 Kbps
0 Kbps
2000 Kbps
Max Achievable Speed
 Download speedachieved during the test was - 1555 Kbps
 For your connection, the acceptable range of speedsis 800-2000 Kbps.
 Additional Information:
 Your DSL Connection Rate :2268 Kbps(DOWN-STREAM), 1183 Kbps(UP-STREAM)
 IP Profile for your line is - 1750 Kbps
The throughput of Best Efforts (BE) classes achieved during the test is - 9.13:22.36:68.51 (SBE:NBEBE)
These figures represent the ratio while sententiously passing Sub BE, Normal BE and Priority BE marked traffic.
The results of this test will vary depending on the way your ISP has decided to use these traffic classes.
2. Upstream Test: -provides background information.
Upload Speed
976 Kbps
0 Kbps
1183 Kbps
Max Achievable Speed
>Upload speed achieved during the test was - 976 Kbps
 Additional Information:
 Upstream Rate IP profile on your line is - 1183 Kbps
We were unable to identify any performance problem with your service at this time.

Answer 1

Thanks for the reply.
I have removed the filter, and I will leave it for a few days to see if I get any improvement.
The noise margin(down) actually increased slightly after removing it, is this to be expected ?
Line state
Connected
Connection time
0 days, 0:01:28
Downstream
2,268 Kbps
Upstream
1,236 Kbps
VPI/VCI
0/38
Type
PPPoA
Modulation
ITU-T G.992.5
Latency type
Interleaved
Noise margin (Down/Up)
29.1 dB / 6.0 dB
Line attenuation (Down/Up)
16.0 dB / 7.0 dB
Output power (Down/Up)
0.0 dBm / 12.1 dBm
Loss of Framing (Local)
0
Loss of Signal (Local)
0
Loss of Power (Local)
0
FEC Errors (Down/Up)
0 / 0
CRC Errors (Down/Up)
0 / 2147480000
HEC Errors (Down/Up)
nil / 12
Error Seconds (Local)
0