SBS 2003 Shared Fax problem

Hi im currently running windows 2003 small business server and am using the built in shared fax system. Reciving faxs is working like a dream but I seam totally unable to send out any fax's. I've turned up logging to maximum and here is all the info it gives on a event.

"0x0201c4d3e2182787"      "0x2001c4d3e2181dea"      11/26/2004 18:02:29      11/26/2004 18:02:29      "Transmission error"      "Unknown fatal error"      "0x0000000c"      11/26/2004 21:38:49      11/26/2004 21:39:14      "Controller Based External V.92 Modem"      "01926 512387"      "01926512387"      "Cheshire Spas & Pool"      0      1      "C:\Documents and Settings\All Users\Application Data\Microsoft\Windows NT\MSFax\Queue\1C4D3E2182787.FQE"      "Buckingham Swimming Pools - Microsoft Word - 26.11.04 Fax to Dennis about grating.doc"      11220      41      " "      " "      " "      "CSP\Malcolm"      "administrator"      " "      "cheshire spas & pools"      " "      " "      " "      " "      " "      " "      " "      " "      " "      " "      "Buckingham Swimming Pools"      "01926 512387"      " "      " "      " "      " "      " "      " "      " "      " "      " "      " "      " "      " "

To make sure it wasnt the line i plugged in a stand alone fax onto the phone line and it sent perfectly. I've tried sending to over 10 numbers and not once was it able to get through always giving the same problem. Please help.