I'll try a shot in the dark...
Is you module for your modem loaded? What 's the stuff with the eagle-USB? (never heard of it) Is that really your problem?
What modem do you use? Paste the output from lspci and lsmod. Check /var/log/messages (/var/log/syslog...), for anything related. Any kind of errors, warnings over there? dmesg | less ?