I installed Matlab on Ubunto 11.04 and when the installation finished, I tried to run it and got this error:

License checkout failed.
License Manager Error -15
MATLAB is unable to connect to the license server.
Check that the license manager has been started, and that the MATLAB client machine can communicate
with the license server.

Troubleshoot this issue by visiting:

Diagnostic Information:
Feature: MATLAB
License path: /root/.matlab/R2011a_licenses:/usr/local/MATLAB/R2011a/licenses/license.dat:/usr/local/MATLAB/R2011a
FLEXnet Licensing error: -15,570. System Error: 115

I checked various forums but I found them difficult to understand since I haven't used Linux that much. One suggested solution was in the following link:
I know my hostname but I don't know what exactly I need to compare it to...

Please help!!! I need to get Matlab running asap, otherwise I have to go back to windows after all the problems I had installing linux ,etc ...

Many Thanks!