@randalllinux I've moved your post to the Mass Effect 2 forum.
Which DLC is that?
Do you use special characters in your Email or your username?
Are you on a public (university) network?
Restart your router in this way:
Pull the power plug > wait 5 minutes > return the power plug
If that not helps, shut down your Windows firewall and disable the real-time scanner of your antivirus software.. (just for testing purpose, don't forget to activate the firewall and the antivirus software later on.)
Should it work after you disabled the firewall, here is a description how to allow a program to communicate through the firewall.
This ports must be open on your Router:
TCP: 80; 443; 9960-9969; 1024-1124; 3216; 18000; 18120; 18060; 27900; 28910; 29900
UDP: 1024-1124; 18000; 29900
If that not helps here is a EA connection troubleshooting guide.
Good to hear. Have fun gaming!