Host Ap Speed Issue

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My Ap is attached to a T1 line. When I have 1 user attached to the ap, I 
get speeds around (900) when I have about 7 users attached speeds drop to 
about (400).  However, MRTG graphs on the T1 show that I am not using 
hardley any of it.

Any one have any ideas.....Here is some logs from dmesg.

wlan0: TXEXC - fid=0x03c1 - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x0135 - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x00f3 - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x0360 - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x022e - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x00ca - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x02f4 - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x017e - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x0292 - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x03f0 - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x0317 - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x013f - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x037e - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x01b1 - status=0x0001 ([RetryErr]) tx_control=000c
   retry_count=0 tx_rate=110 fc=0x0a08 (Data::0 FromDS)
   A1=00:06:25:6d:4f:ba A2=00:02:6f:01:d2:62 A3=00:02:6f:01:d2:62 
A4=00:00:00:00:00:00
wlan0: TXEXC - fid=0x0219 - status=0x0001 ([RetryErr]) tx_control=000c


Thanks for any help you can give me,

Michael