CRM 7 EHP3 sps4 installation - Could not connect to port 4240

Hi Experts!

This is the first time that I use SUM (version 1.0 patch 11). I want set SPS4 on CRM 7.0 EHP3.

In step 5.2 Extraction I getting error:

Unable to execute the SDT request ABAP operation extract on hostname <hostname> instance <N>

Extraction of the ABAP upgrade request ABAP has failed

Error from unit observer

Tool connector failed with .

Connection to SAPup could not be established, see following messages.

Could not connect to host sap-petrov on port 4240.

java.net.ConnectException: Connection refused: connect

java.net.ConnectException: Connection refused: connect

The trace file \sdt\trc\Detect.trc has many errors like:

Jul 17, 2014 9:04:41 AM [Error]:

com.sap.sdt.sapup.rapi.connector.R3upConnector [Thread[ABAP-3,5,main]]:

Could not connect to <hostname>:4240. Could not connect to host <hostname> on port

4240.

java.net.ConnectException: Connection refused: connect

java.net.ConnectException: Connection refused: connect

Last kernel installed, but it did not help.

How to proceed in this case?

Thanks

Ilgizar