3com Router CLI

[jakevdb]

At my current place of work, I inherited the responsibility of maintaining our network. We have a 3com 3030 dsl modem/router. As I have little experience programming routers I struggled through getting it working, but eventually got it running several months ago, and it has worked (although slowly) for a while now.
I have argued with qwest's technical support about our service for a while now. Our router (after a reboot) will connect at full speed (3 Mbps) but eventually retrain down to about 512 Kbps after lots of CRC errors. Qwest claims that it is our modem, so I've been wondering if it has something to do with my programming. I was hoping I could find somebody with 3com CLI experience that would look at my configuration and tell me if there is anything obviously wrong, or make any suggestions. Below is my current-configuration:
<xxxx>display current-configuration
#
#3Com Router Software Extended_V2.04
#
sysname xxxx
#
dhcp server ip-pool 0
network 10.0.0.0 mask 255.255.255.0
gateway-list 10.0.0.1
dns-list 205.171.3.65 4.2.2.2
#
interface Virtual-Template0
ppp chap user xxxxxxxxxxxxxx
ppp chap password simple xxxxxxx
ip address 71.35.252.134 255.255.255.0
nat outbound 2000
#
interface Ethernet1/0
ip address 10.0.0.1 255.255.255.0
#
interface Atm2/0
pvc 0/32
map ppp Virtual-Template0
nat server protocol tcp global 71.35.252.134

http://www inside

10.0.0.3 www
nat server protocol tcp global 71.35.252.134 22 inside 10.0.0.3 22
#
interface NULL0
#
acl number 2000
rule 0 permit source 10.0.0.0 0.0.0.255
#
dhcp server forbidden-ip 10.0.0.1 10.0.0.12
#
ip route-static 0.0.0.0 0.0.0.0 Virtual-Template 0 preference 60
#
user-interface con 0
user-interface vty 0 4
#
return


Any help/suggestions are greatly appreciated.
-Jake