Relayfax problem - sent dcs 3 times without respo

This is the log from RelayFax:

Tue, 12 Feb 2008 18:27:28 +0100: 20: Fax modem on COM3 sending fax
Tue, 12 Feb 2008 18:27:28 +0100: 20: Fax modem offhook and dialing
Tue, 12 Feb 2008 18:27:28 +0100: 20: Sending fax to:
Tue, 12 Feb 2008 18:27:28 +0100: 20: > Name:
Tue, 12 Feb 2008 18:27:28 +0100: 20: > Company:
Tue, 12 Feb 2008 18:27:28 +0100: 20: > Fax number: 452 via port COM3
Tue, 12 Feb 2008 18:27:28 +0100: 20: > Fax subject: 452
Tue, 12 Feb 2008 18:27:28 +0100: 20: Sending fax from:
Tue, 12 Feb 2008 18:27:28 +0100: 20: > Name: FAX
Tue, 12 Feb 2008 18:27:28 +0100: 20: > Company: mk
Tue, 12 Feb 2008 18:27:28 +0100: 20: > Fax number: 412
Tue, 12 Feb 2008 18:27:44 +0100: 20: Connected to remote fax machine
Tue, 12 Feb 2008 18:27:46 +0100: 20: Received CSI: Fax
Tue, 12 Feb 2008 18:27:46 +0100: 20: Received DIS: (14400 baud, w=1728, l=Unlimited, Fine, 2D, ECM=No, scan=0ms)
Tue, 12 Feb 2008 18:27:46 +0100: 20: Sent TSI: 0
Tue, 12 Feb 2008 18:27:47 +0100: 20: Sent DCS: (14400 baud, w=1728, l=Unlimited, Fine, 2D, ECM=No, scan=0ms)
Tue, 12 Feb 2008 18:27:52 +0100: 20: Sent training @ 14400 baud
Tue, 12 Feb 2008 18:27:53 +0100: 20: Received CFR
Tue, 12 Feb 2008 18:28:00 +0100: 20: Sent MPS
Tue, 12 Feb 2008 18:28:02 +0100: 20: Received RTN
Tue, 12 Feb 2008 18:28:07 +0100: 20: Sent training @ 14400 baud
Tue, 12 Feb 2008 18:28:09 +0100: 20: Sent DCS: (14400 baud, w=1728, l=Unlimited, Fine, 2D, ECM=No, scan=0ms)
Tue, 12 Feb 2008 18:28:17 +0100: 20: Sent training @ 14400 baud
Tue, 12 Feb 2008 18:28:17 +0100: 20: Sent DCS: (14400 baud, w=1728, l=Unlimited, Fine, 2D, ECM=No, scan=0ms)
Tue, 12 Feb 2008 18:28:22 +0100: 20: Sent training @ 14400 baud
Tue, 12 Feb 2008 18:28:25 +0100: 20: Sent DCN
Tue, 12 Feb 2008 18:28:26 +0100: 20: Fax modem on COM3 error: Sent DCS 3 times without response
Tue, 12 Feb 2008 18:28:26 +0100: ----------

I would like to send whole fax, but when I receive the fax on the other machine I get an error which was written in log. what I should do to send whole fax correctly? It is fax saved as tif file (5 pages). receiving always ends with error hmm can anyone to help me. I dont have any other idea to do it correctly

Im sorry for my english hmm it isnt good

please help as fast as you can