COMSOL License Error -15, 570

Dear COMSOL team,

We purchased a 64 bit COMSOL 4.3 verson of software along with a server license. After installing the software on a Linux (Debian 6 Squeeze) based system. We are encountring the following problem. When I start comsol it starts but generates an error in a window. After i close the error window COMSOL exits.


License Error: -15
Cannot connect to license sewrver system.
The license server manager (lmgrd) has not been started yet,
the wrong port@host or license file is being used, or the
port or hostname in the license file has been changed.
Feature: COMSOLGUI
Servername: xxxxxxxxxx
License path: /usr/local/comsol43/license/license.dat:
FLEXnet Licensing error: -15,570. System Error_ 115 "Operation now in progress"
For further information, go to www.flexerasoftware.com.


Thanks in advance for the coperation and support.


Regards,
Yousuf Khan

Institute of Nanostructure Technologies and Analytics (INA)
Technological Electronics - University of Kassel
M.Sc. Electrical Communication Engr.
Heinrich-Plett-Str- 40
34123 Kassel - Germany
Tel.: +49-561-804-4147; Fax: +49 561 804 - 4488
E-mail: yousuf.khan@ina.uni-kassel.de
Web: www.ina-kassel.de