Modelsim Altera 6.1g

Is there a solution for this problem? I have the same with ModelSim-Altera 6.1g. I've tried it on my WinXP and on my Vista PC. On both the same Error:

Fatal License Error:

Unable to checkout a license. Make sure your license file environment variables are set correctly and then run 'lmutil lmdiag' to diagnose the problem.

Modelsim-Altera uses the following environment variables to check the licenses (listed in the orer of preference)

1. MGLS_LICENSE_FILE

2. LM_LICENSE_FILE

lmutil lmdiag tells twice, that this (my) machine is the correct node for this node-locked license. First for 'quartus_lite' and second for 'alteramtiwe'.

Here the installation sequence on a new installed system:

quartus II 8.0sp1 Web edition installed

modelsim-altera 6.1g (Quartus II 8.0) installed

quartus started, LM_LICENSE_FILE as source for the license choosed

- no license found

LM_LICENSE_FILE as system variable added with the path to the newly requested license file

quartus started

- license found and accepted

modelsim started

- above printed license error occures, every time I start the software.

What can I do? I asked google before and found no solution for this problem.

plz help.